Sodium is combined with bromine to produce sodium bromide. If you use 25.0 g of bromine, how many molecules is this?

Answers

Answer 1

25.0grams of bromine is equivalent to 1.881 × 10²³ molecules.

How to calculate number of molecules?

The number of molecules of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number (6.02 × 10²³).

Avogadro's number is the number of atoms present in 12 grams of isotopically pure carbon-12, being 6.02214076 × 10²³. By definition, it is the number of elementary entities (atoms or molecules) comprising one mole of a given substance.

According to this question, sodium is combined with bromine to produce sodium bromide. If one uses 25.0g of bromine, the number of moles of bromine used is as follows:

no of moles = 25.0g ÷ 80g/mol

no of moles = 0.3125moles

no of molecules = 0.3125 × 6.02 × 10²³ = 1.881 × 10²³ molecules

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Related Questions

Minute maid states that a bottle of juice contains 473 ml. Consumer groups are interested in determining if the bottles contain less than the amount stated on the label. To test their claim, they sample 30 bottles. The sample mean was 472ml and the standard deviation is 0. 2. What does mu represent here?.

Answers

The term mu here represents the average contents of all bottles of juice in the population, which is unknown. Option B

What is the standard deviation?

The term standard deviation has to do with the extent that values are scattered around the mean. Now we know that the mean is the average of the distribution.

The standard deviation shows the extent to which the values differ from the mean value of the distribution. It is a measure of dispersion.

Thus, the term mu here represents the average contents of all bottles of juice in the population, which is unknown. Option B

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Missing parts;

Minute Maid states that a bottle of juice contains 473 mL. Consumer groups are interested in determining if the bottles contain less than the amount stated on the label. To test their claim, they sample 30 bottles. The sample mean was 472mL and the standard deviation is 0.2.

What does mu represent here?

A. The average contents of all bottles of juice in the sample, which is unknown.

B. The average contents of all bottles of juice in the population, which is unknown.

C. The average contents of all bottles of juice in the population, which is 472mL.

D. The average contents of all bottles of juice in the sample, which is 472mL.

A 5ml solution containing ph of 3.5 was mixed with a solution containing ph of 10.5
What will you expect the pH of the mixture be? Basic, acidic, or neutral? Also provide the pH of the combined solution.

Answers

The resulting solution will be neutral having a pH of 7.

What is the pH?

The term pH is defined as the hydrogen ion concentration in solution. We know that the pH is inversely related to the hydrogen ion concentration in solution.

We know that the reaction between an acid and a base produced a salt. In this case, the salt that is produced is neutral because the acid is completely reacted with the base.

Since the solution contains a mixture of a  containing pH of 3.5 and that of a pH of 10.5, the resulting solution will be neutral having a pH of 7.

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a gas has a density of 3.21 g/L at stp what is the gas

Answers

The gas is bromine. (This is a fact)

Which of these terms is used to describe a solution that results when both the salute and solvent are solid. Is it alloy, surface solution or aqueous solution

Answers

The terms is used to describe a solution that results when both the salute and solvent are called alloys

What are alloys?

Alllys simply refers to mixture of a solid metal made by combining two or more metallic elements.

There exist alloys of

NickelCoppersBrass

In conclusion, the terms is used to describe a solution that results when both the salute and solvent are called alloys

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How many moles of methane are produced when 85.1 moles of carbon dioxide gas react with excess hydrogen gas?

Answers

Taking into account the reaction stoichiometry, 340.0 moles  of methane are produced when 85.1 moles of carbon dioxide gas react with excess hydrogen gas

Reaction stoichiometry

In first place, the balanced reaction is:

CO₂ + 4 H₄  → CH₄ + 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

CO₂: 1 moleH₄: 4 moles   CH₄: 1 moleH₂O: 2 moles

Moles of CH₄ formed

The following rule of three can be applied: if by reaction stoichiometry 1 mole of CO₂ form 4 moles of CH₄, 85.1 moles of CO₂ form how many moles of CH₄?

[tex]moles of CH_{4} =\frac{85.1 moles of CO_{2}x4 moles of CH_{4} }{1 moles of CO_{2}}[/tex]

moles of CH₄= 340.4 moles

Then, 340.0 moles  of methane are produced when 85.1 moles of carbon dioxide gas react with excess hydrogen gas

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How many moles of PC15 can be produced from 58.0 g of Cl₂ (and excess
P4)?

Answers

0.3268 moles of PC15 can be produced from 58.0 g of Cl₂ (and excess

P4).

How to calculate moles?

The mole, symbol mol, exists as the SI base unit of the amount of substance. The quantity amount of substance exists as a measurement of how many elementary entities of a provided substance stand in an object or sample.

The balanced chemical equation is

[tex]P_{4} + 10Cl_{2} = 4PCl_{5}[/tex]

The mass of clorine is m([tex]Cl_{2}[/tex]) = 58.0 g

The amount of clorine is n([tex]Cl_{2}[/tex]) = m([tex]Cl_{2}[/tex])/M([tex]Cl_{2}[/tex]) = 58/70.906 = 0.817 mol

The stoichiometric reaction,shows that

10 moles of [tex]Cl_{2}[/tex] yield 4 moles of [tex]PCl_{5}[/tex];

0.817 of [tex]Cl_{2}[/tex] yield x moles of [tex]PCl_{5}[/tex]

n([tex]PCl_{5}[/tex]) = 4*0.817/10 = 0.3268 mole

0.3268 moles of PC15 can be produced from 58.0 g of Cl₂ (and excess

P4).

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Select the correct structure that
corresponds to the name.
1,1,1-trifluoroethane

Answers

The correct chemical structure that corresponds to 1,1,1-trifluoroethane is (a).

What is  1,1,1-trifluoroethane?

A chemical structure is a spatial arrangement of atoms in a molecule. It determines the molecular geometry and when necessary the electronic chemistry as well .1,1,1-Trifluoroethane or simply known as trifluoroethane is Hydrofluorocarbon (HFC) compound that is colourless and highly inflammable gas with ether like odour. One method of preparation of 1,1,1-Trifluoroethane is by fluorination of 1-chloro-1,1-difluoroethane in the presence of hydrofluoric acid.  The chemical formula for 1,1,1-Trifluoroethane is [tex]C__{2} } H_{3} F_{3}[/tex]. The high stability of it's chemical structure because of being heavier than air makes it a greenhouse gas with high infrared absorbent power. It can be used as a propellant or refrigerant and in cleaning of electrical equipments.

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A gaseous compound containing hydrogen and carbon is decomposed and found to contain 90.00% carbon and 10.00% hydrogen by mass. The mass of 371 mL of the gas, measured at 415 mm Hg and 41°C, is found to be 0.315 g. What is the molecular formula of the compound?

Answers

The molecular formula of the compound is C₃H₄.

What is the molecular formula of the compound?

The molecular formula of the compound is determined from the molecular mass of the compound.

The molecular mass of the compound is derived using the general gas equation as follows:

P₁V₁/T₁ = P₂V₂/T₂

V₂ = P₁V₁T₂/P₂T₁

Volume at STP, V₂ = (415 * 371 * 298(760 * 314)

V₂ = 192.26 mL = 0.192 L

Molar mass of gas = 22.4/0.192 * 0.315 = 36.75 g

Molecular formula is then determined from the mole ratio of the elements;

Carbon = 0.9 * 36.75/12 = 3

Hydrogen = 0.1 * 40/1 = 4

Thus, the molecular formula of the compound is C₃H₄.

In conclusion, the molecular formula of the gas is derived from the molecular mass.

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what is the name of p214

Answers

diphosphorus tetraiodide is the name of the p2I4 compound.

What is the name of p2I4?

The name of p2I4 is diphosphorus tetraiodide because there are two atoms with phosphorus and four atoms with iodine. We know that 'di' word is used for two while on the other hand, tetra word is used for four.

So we can conclude that diphosphorus tetraiodide is the name of the p2I4 compound.

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What does h20 mean on the periodic elements chart

Answers

Answer:

The compound, H₂O, will not be found on the periodic table. This is because the periodic table only consists of individual elements. That being said, the elements found within H₂O are located on the periodic table. H₂O consists of hydrogen, denoted by the symbol "H", and oxygen, denoted by the symbol "O". The subscript (the 2) tells us that there are 2 hydrogen atoms located in the H₂O molecule.

Hydrogen is the first element listed on the periodic table and can be found in the top leftmost position. Oxygen is the eighth element on the periodic able and is located in the second row at the top right.

The volume of a sample of oxygen is 580.3 mL when
the pressure is 0.376 atm and the temperature is 43 °C.
At what temperature is the volume 907.1 L and the
pressure 0.415 atm?
a. 545
O b. 74.2
O c. -89.9
O d. 272

Answers

Answer:

545

Explanation:

If we let the unknown temperature in Kelvin be x,

[tex] \frac{0.376 \times 580.3}{43+273} = \frac{0.415 \times 907.1}{x} \\ \\ x = 545[/tex]

help me out with this question

Answers

The concentration will be 12 M. The first option is the correct one.

Concentration

It is calculated by dividing the number of moles of solute present in a solution by the volume of the solution.

In this case, the number of moles of solute = 1.2 mols

volume of solvent = 100 mL or 0.1 L

Concentration of the solution = 1.2/0.1 = 12 mol/L or 12 M

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A 0.266-g sample of NaC1 (molar mass = 58.44 g/mol) is dissolved in enough water to make 5.20 mL of
solution. Calculate the molarity of the resulting solution.
O 0.875 M
O 4.55 x 10-3 M
O 0.987 M
O 1.14 M
O 0.731 M

Answers

0.266g / 58.44g/mol= 0.00455mol
M= moles / volume (L)
0.00455mol / .0052L
M= 0.875

How can mechanical waves help in the treatment of cancer?

Answers

Mechanical waves can help in the treatment of cancer due to heat generated by the high frequency waves.

What is mechanical wave?

A mechanical wave is a wave that requires material medium for its propagation, example include;

water waves, sound waves, and seismic waves.

Mechanical waves in treatment of cancers

Sound wave in example of mechanical wave because it requires material medium for its propagation.

High-frequency sound waves (HIFU) is used in the  treatment  of cancer because the strong beam generates heat which is directed to a specific part of a cancer.

The heat generated destroys the cancer cells.

Thus, mechanical waves can help in the treatment of cancer due to heat generated by the high frequency waves.

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In this activity, you are tasked with designing an airbag for a company that creates airbags for automobiles. You must design the driver’s front airbag for a specific car model so it will protect the driver as effectively as possible. For this car, the airbag must have a volume of 58 liters when fully inflated. To provide an adequate cushion for the driver’s head, the air pressure inside the airbag should be 4.4 psi. This pressure value is in addition to the normal atmospheric pressure of 14.7 psi, giving a total absolute pressure of 19.1 psi, which equals 1.30 atmospheres.

Answers

The airbag is designed to produce the volume of nitrogen gas required to fill up the airbag.

What is the function of an airbag?

An airbag is a bag which is designed to self-inflate and serve as a cushion for the head and neck of a driver to prevent injuries when an impact occurs head-on on the car.

The gas that inflates the airbag is nitrogen which is produced from sodium azide according to equation below:

2NaN₃ → 2Na + 3N₂

In conclusion, the design of the airbag is such that the correct amount of sodium azide is present to produce the volume of nitrogen required to fill up the airbag.

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What volume of barium chloride, BaCl2 is needed to make a 2.5 M barium
chloride solution with 0.45 mol BaCl2?

Answers

Answer:

0.18 L

Explanation:

You can find the volume using the molarity ratio:

Molarity = moles / volume (L)

You can plug the given values into the equation and simplify to find the volume.

Molarity = moles / volume                           <----- Molarity ratio

2.5 M = 0.45 moles / volume                      <----- Insert values

(2.5 M) x volume = 0.45 moles                   <----- Multiply both sides by volume

volume = 0.18 L                                            <----- Divide both sides by 2.5

If charcoal and sugar were the the main impurities present in crude acetanilide would recrystallisation from water be a good method of purification explain why?

Answers

Yes, recrystallization from water would be a viable technique of purification if crude acetanilide contained sugar and charcoal. Due to their physical insolubility, charcoal found in crude acetanilide and water will form a heterogeneous combination. Charcoal will separate during crystallization because it is insoluble in water. Sugar and the unreconstituted crude acetanilide make up the remaining portion of the combination. Crude acetanilide will crystallize in this combination and separate from the sugar and water solution. Filtration will be used to capture the crude acetanilide that has solidified. Sugar and water make a soluble solution, thus they are kept separate. This is how the charcoal and sugar combination is purified and its constituent parts are separated from crude acetanilide using the recrystallization process from water.

1. given 5 mols of the compound below what is the mol ratio between the compound and O? Ca_4Si_2O_6(CO_3)(OH)_2
2. Given 2 mols of the compound in problem one what is the mol to mol ratio os Si?
3. Given 5 mols of the compound in problem one what is the mol to mol ratio between the compound and Ca?
4. Given 3.5 mols of the compound in problem one what is the mol to mol ratio between the compound and C?
5. in the reaction below give the mol to mol ratio between the underlined species
Pb(NO_3)_2(ap)+2KI(aq) -> PbI_2(s)+2KNO_3(aq)
underline underline

Answers

The mole ratio of the compound and its constituent elements are as follows:

The mole ratio between the compound and O is 5 : 22The mole ratio between the compound and Si is 2 : 4The mole ratio between the compound and Ca is 5 : 20The mole ratio between the compound and C is  1 : 1

What is mole ratio?

Mole ratio is the ratio of the moles of one or more elements or compounds to another.

The given compound is Ca₄Si₂O₆(CO₃)(OH)₂

Moles of oxygen present in 1 mole of compound = 11 moles

Moles of Si present in 1 mole of compound = 2 moles

Moles of Ca present in 1 mole of compound = 4 moles

Moles of C present in 1 mole of compound = 1 mole

Given 5 moles of the compound below, the mole ratio between the compound and O is 5 : 22Given 2 moles of the compound below, the mole ratio between the compound and Si is 2 : 4Given 5 moles of the compound below, the mole ratio between the compound and Ca is 5 : 20Given 3.5 moles of the compound below, the mole ratio between the compound and C is  1 : 1

Given the equation of the reaction below;

Pb(NO₃)₂ (aq) + 2 KI (aq) --> PbI₂ (s) + 2 KNO₃ (aq)

the mole ratio of the reactants and products are as follows:

Pb(NO₃)₂ : 2 KI (aq) = 1 : 2Pb(NO₃)₂ : PbI₂ (s0 = 1 : 1Pb(NO₃)₂ : 2 KNO₃ (aq) = 1 : 2

In conclusion, the mole ratio of reaction is the ratio in which moles of the substances combine.

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What is common to solving all mola mass problems?

Answers

All you need to do is to follow these 3 steps.

1. Estimate the number of each kind of atom present in the compound using the chemical formula in order to determine the molar mass of the molecule.

Divide each element's atomic weight (found in the periodic table) by the quantity of that element's atoms in the compound.Add up the total, then follow the number with the units of grams/mole.

eg. Water

2 hydrogen atoms and 1 oxygen atom make up the chemical formula H20.H- 1's atomic weightO-16's atomic weightNumber of H atoms overall in formula 2Number of O atoms overall in formula 1The molar mass will thus be as follows: H 2 x 1= 2 O 1 x 16= 16 16+2= 18Water's molar mass is 18 g/mol as a result.

(Yield Problem)
3Mg+2FeCl3=2Fe+3MgCl2
When 20.5 g of Mg reacts with an excess of FeCl3, 25.9 g of Fe is produced. What is the percent
yield of the reaction?

Answers

Answer:

Percent Yield Fe  =  82.5%

Explanation:

The actual yield is the value produced after an experiment is conducted. The theoretical yield is the value calculated using the balanced chemical equation and atomic/molar masses.

To find the percent yield of iron (Fe), you need to (1) convert grams Al to moles Al (via atomic mass), then (2) convert moles Al to moles Fe (via mole-to-mole ratio from equation coefficients), then (3) convert moles Fe to grams Fe (via atomic mass), and then (4) calculate the percent yield. It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the sig figs of the given values.

Atomic Mass (Mg): 24.305 g/mol

Atomic Mass (Fe): 55.845 g/mol

3 Mg + 2 FeCl₃ -----> 2 Fe + 3 MgCl₂

20.5 g Mg           1 mole              2 moles Fe            55.845 g
-----------------  x  -----------------  x  ----------------------  x  -----------------  =  
                           24.305 g           3 moles Mg             1 mole

=  31.4 g Fe

                                     Actual Yield
Percent Yield  =  ----------------------------------  x  100%
                                 Theoretical Yield

                               25.9 g Fe
Percent Yield  =  --------------------  x  100%
                               31.4 g Fe

Percent Yield  =  82.5%

I need help with the solution

Answers

Answer:

36.1% Ca

Explanation:

To find the percent calcium, you need to (1) construct the chemical formula of calcium chloride, then (2) calculate the molar mass of calcium chloride, and then (3) calculate the percent calcium in calcium chloride.

(Step 1)

Calcium = Ca²⁺

Chlorine = Cl⁻

Calcium Chloride = CaCl₂

(Step 2)

Atomic Mass (Ca): 40.078 g/mol

Atomic Mass (Cl): 35.453 g/mol

Molar Mass (CaCl₂): 40.078 g/mol + 2(35.453 g/mol)

Molar Mass (CaCl₂): 110.984 g/mol

(Step 3)

CaCl₂ = 1 atom Ca and 2 atoms Cl

1 atom Ca = 40.078 g/mol

   40.078 g Ca
--------------------------  x  100%  =  36.1% Ca
 110.984 g CaCl₂

Which statements are NOT involved in boiling water? (check all the possible answers)
a.weakening intermolecular interactions
b.breaking covalent bonds
c.producing single atoms of H and O
d.breaking hydrogen bonds

Answers

B.
There is no covalent bonds in pure H2O. Only hydrogen

How many moles of nitrogen gas are there in 6.8 liters at room temperature and pressure (293 K and 100 kPa)?

A. 163.2
B. 0.28
C. 152.3
D. 0.30

Answers

0.28 moles of nitrogen gas are there in 6.8 liters at room temperature and pressure (293 K and 100 kPa).

Ideal gas law :

An ideal gas is a gas in which atoms dose not exert any force on each other even after collision which walls and other atoms (inelastic collisions).

Mole definition:

The mole is the amount of compound present in a given system which has molecular mass as that of the mass of carbon12 .carbon 12

Using ideal gas law ,

PV=nRT

Given,

pressure = P = 100kPa

Volume = V = 6.8 Lit

Temperature = room temperature = T = 293 K

R= universal gas constant = 8.314

n= moles = ?

∴[tex]n = \frac{PV}{RT}[/tex]

∴ n = 100 × 6.8 / 8.314 × 293

∴n = 0.28 moles

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Allowing water to cascade or bubble in a fountain during the purification process is an example of
a chemical reaction
O a solid dissolving in a liquid
O only a and b
O ion exchange
O a gas dissolving in a liquid

Answers

Answer:

ion exchange

Explanation:

because in the time period of chemical reactions it product ion

B- ion exchange should be it

What would the hydrogen ion concentration be if the pOH was 6?

Answers

Answer:

10-6mol/l

Explanation:

hope i helped

What is the main problem with a Planetary system model of the atom?
Electrons moving in a circle would be accelerating, would lose energy, and
would therefore not be able to maintain their orbits.
O Protons would be required to emit electromagnetic radiation when accelerated.
O The Planetary system model requires a massless, positively charged matrix and
there is no evidence that this exists.
1 nts

Answers

Electrons moving in a circle would be accelerating, would lose energy, and would therefore not be able to maintain their orbits.

What are atomic models?

Atomic models are designed to determine the nature of the atom. There have been several atomic models whose ultimate aim have been to underscore the interaction between the particles that compose the atom.

The atomic models include;

The Thompson modelThe Rutherford modelThe Bohr modelThe Wave mechanics model

The main problem of the Planetary system model (Rutherford model) of the atom is that electrons moving in a circle would be accelerating, would lose energy, and would therefore not be able to maintain their orbits.

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The question is in the photo

Answers

The concentration of LiOH in the reaction is 0.103 M

What is the concentration of lithium hydroxide?

This is a neutralization reaction and the equation of the reaction is written as; H2SO4(aq) + 2LiOH(aq) ---->Li2SO4(aq) + H2O(l)

The average volume of acid used is obtained from;

8.54 + 8.51 + 8.68/ 3 = 8.58 mL

CA = 0.150 M

VA = 8.58 mL

CB = ?

VB= 25.0 mL

NA = 1

NB = 2

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

CB = CAVANB/VBNA

CB = 0.150 * 8.58 * 2/25.0 * 1

CB = 0.103 M

The concentration of LiOH in the reaction is 0.103 M

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What would the pH of a solution that had a hydroxide ion concentration of 4.9 x 10-5 M be?

Answers

Taking into account the definition of pH and pOH, the pH of the solution is 9.69.

Definition of pH

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

Definition of pOH

Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

Relationship between pH and pOH

The following relationship can be established between pH and pOH:

pOH + pH= 14

pH in this case

A solution had a hydroxide ion concentration of 4.9×10⁻⁵ M. This is [OH⁻]= 4.9×10⁻⁵ M. So, pOH is calculated as:

pOH= - log (4.9×10⁻⁵ M)

Solving;

pOH= 4.31

Replacing in the relationship established between pH and pOH, the pH can be calculated as:

pH + 4.31= 14

Solving:

pH= 14 - 4.31

pH= 9.69

In summary, the pH of the solution is 9.69.

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How many atoms of oxygen are present in 7.51 grams of
glycine with formula C₂H5O2N?

Answers

1.205 × 10²³ atoms of oxygen will be present in 7.51 grams of glycine with formula C₂H5O2N. Details about number of atoms can be found below.

How to calculate number of atoms?

The number of atoms of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number.

However, the number of moles of oxygen in glycine can be calculated using the following expression:

Molar mass of C₂H5O2N = 75.07g/mol

Mass of oxygen in glycine = 32g/mol

Hence; 32/75.07 × 7.51 = 3.2grams of oxygen in glycine

Moles of oxygen = 3.2g ÷ 16g/mol = 0.2moles

Number of atoms of oxygen = 0.2 × 6.02 × 10²³ = 1.205 × 10²³ atoms

Therefore, 1.205 × 10²³ atoms of oxygen will be present in 7.51 grams of glycine with formula C₂H5O2N.

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What would the hydrogen ion concentration be if the pOH was 6?

Answers

Taking into account the definition of pH and pOH, the hydrogen ion concentration will be 1×10⁻⁸ M.

Definition of pH

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

Definition of pOH

Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

Relationship between pH and pOH

The following relationship can be established between pH and pOH:

pOH + pH= 14

Hydroxide ion concentration

In this case, you know that pOH= 6.

Replacing in the relationship established between pH and pOH, the pH can be calculated as:

pH + 6= 14

Solving:

pH= 14 - 6

pH= 8

Replacing in the definition of pH the concentration of H⁺ ions is obtained:

- log [H⁺]= 8

Solving:

[H⁺]= 10⁻⁸

[H⁺]= 1×10⁻⁸ M

In summary, the hydrogen ion concentration will be 1×10⁻⁸ M.

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FILL IN THE BLANK. In Shakespeare's tragedy, Othello, _____ ruins Othello's marriage. THis image shows a _____pump, which uses geothermal energy to either heat or cool a house, depending on the season. when the mass of a star's core is greater than 1.4 times the mass of the sun, degenerate electrons cant keep it stable as a white dwarf. instead, it becomes: question content area the poisson probability distribution is used with a continuous random variable. The admission fee at a county fair is $3 for children and $5 for adults. On the first day, 1,500 people entered the county fair and $5,740 was collected. If one of the equations of the system is c+a=1,500, where cis the number of child admissions and is the number of adult admissions, what is the second equation? choose the best iupac name for the compound below. a. 6-bromo-4-ethynyl-3-methyloctane b. 3-sec-butyl-5-bromo-1-heptyne c. 5-bromo-3-sec-butyl-1-heptyne d. 5-bromo-4-octyne A company consumed 3550 kWh of energy in two months. If electricity costs 18 cents per kWh and HST is 13%, calculate the bill. The diameter of the hollow core of a solid propellant grain remains axially uniform during burning. Its length L is 5 m, and initially its inner diameter d is 0.37 m; the outer diameter of the grain D is 0.82 m. The figure below explains the geometry (2) D IC tC The burning rate r is 1.2 cm/s, which as a first approximation may be assumed to be uniform over the entire iner surface of the grain. The grain density is 1875 kg/m3. The combustion chamber stagnation pressure and stagnation temperature downstream of the grain (at (2)) are 2.17 MPa and 2580K, respectively. The gas specific ratio and molecular weight are 1.2 and 20, respectively Neglecting the effects of friction, but recognizing that there is a nonzero flow of gas at the end of the grain, (2), estimate at the beginning and end of combustion, a.) The Mach number M2 at the downstream end of the grain b.) The static pressure ratio p2/pi along the length of the grain What is the ultimate fate of an mRNA that is targeted by a microRNA miRNA )? If a language L is context-free, then its complement L' is also context-free. True or False? which of the choices listed indicates that the os is in secure desktop modea. CTRL+ALT_DELETEb. UACc. Windows login screen A helicopter flew directly above the path BD at a constant height of 500 m. Calculate the greatest angle of depression of the point C as seen by a passenger on the helicopter Choose all features common to most next generation sequencing technologies.Millions of sequencing reactions are performed simultaneouslyConventional cloning is not required prior to sequencingSequencing reactions are directly read instead of using electrophoresis A property produces a first year NOI of $100,000, which is expected to grow by 2% per year. If the property is expected to be sold in year 10, what is the expected sale price based on a terminal capitalization rate of 9.5% applied to the eleventh year NOI? the impact of natural disasters is much greater on developed countries than on least developed countries. which of the following is a device directly used by an end user to access a network _____: the sudden, temporary reversal of the difference in charge between the inside and outside of a neuron a thin wire is bent into the shape of a semicircle x2 y2 = 81, x 0. if the linear density is a constant k, find the mass and center of mass of the wire. Write the final draft of your persuasive essay. You may copy and paste the accented and special characters from this list if needed: , , , , , , , , , , , , , , Your final draft should be written in complete sentences in Spanish and include the following requirements:In Paragraph One:Include saber or conocer to hook your audience.Include verbs in the present progressive tense to state your claim.Include two facts about the animal from the research.Include vocabulary words, phrases, and expressions learned in the course.In Paragraph Two:Include one regular or irregular verb in the future tense to show a way to protect the animal from becoming extinct.Include a persuasive phrase and one regular or irregular verb in the future tense to make a call to action, stating the action you want your reader to take.Include a concluding sentence that uses an impersonal expression and supports your claim.Include vocabulary words, phrases, and expressions learned in the course. You are given a set of N sticks, which are lying on top of each other in some configuration. Each stick is specified by its two endpoints; each endpoint is an ordered triple giving its x, y, and z coordinates; no stick is vertical. A stick may be picked up only if there is no stick on top of it. a. Explain how to write a routine that takes two sticks a and b and reports whether a is above, below, or unrelated to b. (This has nothing to do with graph theory.) b. Give an algorithm that determines whether it is possible to pick up all the sticks, and if so, provides a sequence of stick pickups that accomplishes this.