The table below gives the numbers of protons, electrons, and neutrons in four atoms.
Atom
Number of protons
Number of neutrons
Number of electrons
1
9
8
9
2
19
9
18
3
9
9
10
9
10
19
Based on the table, which atom has a charge of -1?
1
2
Оооо
3
4

Chemical reactions are indeed an essential aspect of technology, society, and life itself. Therefore, in Substance 2 investigation,  liquids reacted chemically.

A chemical reaction is a process that converts one or more compounds, known as reactants, into one or more distinct substances, known as products. Chemical elements and compounds are examples of substances. A chemical reaction reconfigures the component atoms of the reagents to produce various products.

Chemical reactions are indeed an essential aspect of technology, society, and life itself. Many activities involving oxidation processes that have recognized and practiced for hundreds of years include burning fuels, melting iron, creating glass or pottery, brewing beer, including making wine and cheese. In Substance 2 investigation,  liquids reacted chemically.

Therefore, in Substance 2 investigation,  liquids reacted chemically.

To learn more about Chemical reaction, here:

https://brainly.com/question/24123817

#SPJ6

Answer:

-73.6kJ/mol

Explanation:

The solution is increasing its temperature from 13.5°C to 29.5°C, that means the enthalpy change is < 0

The released heat is determined using the calorimeter equation:

Q = -C×m×ΔT

Where Q is heat,

C is specific heat of the solution (4.18J/g°C)

m is mass of the solution (31.0mL = 31.0g + 2.30g = 33.3g)

And ΔT is change in temperature (29.5°C - 13.5°C = 16°C)

Replacing:

Q = -4.18J/g°C×33.3g×16°C

Q = -2227J are released

This heat is released when 2.30g are dissolved, that is:

-2227J / 2.30g × (76.0g / mol) = -73591J/mol =

Answer:

Sublimation

Explanation:

Answer:

You shouldn't smell nor taste chemicals. They are dangerous and if inhaled or swallowed, they will cause many health issues.

The change in internal energy of the system is 110 kJ.

Change in internal energy is the difference between the energy absorbed by the system and the work done by the system.

To calculate the change in the internal energy of the system, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The change in internal energy of the system is 110 kJ.
Learn more about change in internal energy here: https://brainly.com/question/17136958

Answer:

Neon-20 would be the most abundant isotope among the three.

Explanation:

The relative atomic mass of an element is the average of the relative isotope mass of its naturally-occurring isotopes, weighted according to the relative abundance of each isotope.

The relative isotope mass of an isotope atom is approximately the same as its mass number. The relative isotope mass of one neon-20 atom is approximately [tex]20[/tex]. Similarly, the relative isotope mass of one neon-21 atom and one neon-22 atom will be [tex]21[/tex] and [tex]22[/tex], respectively.

The relative atomic mass of neon is approximately [tex]20.180[/tex] (as seen on a modern periodic table.) This number is supposed to be the weighted average of the relative isotope mass of neon-20, neon-21, and neon-22 according to their relative abundance.

If the three isotopes were to have a relatively equal abundance, then the relative atomic mass of neon should be very close to [tex]21[/tex]. However, that's not actually the case. The commonly-accepted relative atomic mass of neon, [tex]20.180[/tex], is significantly tilted towards [tex]20[/tex], which is the (approximate) relative isotope mass of neon-20.

The question assumes that neon-20, neon-21, and neon-22 are the only three naturally-occurring isotopes of neon. In other words, there's no naturally-occuring isotope of neon with an isotope mass smaller than that of neon-20. Based on that assumption, neon-20 must have been considerably more abundant than the heavier neon-21 and neon-22 to ensure that weighted average [tex]20.180[/tex] is much smaller than the relative isotope mass of neon-21 and neon-22.

Answer:

saturated refers to a point of maximum concentration, in which no more solute may be dissolved in a solvent.

Acid:sulfuric,nitric

Basic salt:Calcium carbonate (CaCO3)

Sodium acetate (NaOOCCH3)

Explanation:

mark me brainliest

Taking into account the definition of pH, the [H⁺] in the rain is 100 times greater than in a cup of coffee.

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

Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:

pH= - log [H⁺]

The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.

In this case, you know:

You can replace this values in the definition of pH:

Solving:

Comparing [H⁺], you get:

[tex]\frac{1x10^{-3} }{1x10^{-5} } =100[/tex]

Finally, the [H⁺] in the rain is 100 times greater than in a cup of coffee.

Learn more about pH:

https://brainly.com/question/26424076

https://brainly.com/question/26524338

https://brainly.com/question/13557815

https://brainly.com/question/24595796

https://brainly.com/question/24753206

Answer:

5496 g of epinephrine

Explanation:

From the question, 5.00 moles of epinephrine is required to make Epipen.

Molar Mass of epinephrine = 183.20 g/mol

mass of 5 moles of epinephrine= [tex]5.00 moles * 183.20 g/mol=916 g[/tex]

Therefore, 30.00 moles of epinephrine needs 30.00 * 916/5 =5496 g of epinephrine

Answer:

The real answer is carbon dioxide. they breath carbon and let out oxygen for us to breath

Answer:

lemme slurp them juices out of that p*ssy. You must taste sweet.

Explanation:

The compound is unsaturated due to the presence of double bond.

A saturated compound is a compound that have carbon-carbon single bonds while on the other hand, Unsaturated compounds are the compunds having double bonds and triple bonds. We can see that there is double bond between two carbon atoms so we can conclude that the compound is unsaturated due to the presence of double bond.

Learn more about compound here: https://brainly.com/question/634206

With a 27.7 mL sample of a 0.400 M aqueous hypochlorous acid solution  titrated with a 0.335 M aqueous potassium hydroxide solution, the pH value is mathematically given as

pH=12.90

Moles of HClO=0.329*21.5

Moles of HClO=7.0735

and

Moles of KOH=0.456*23.3

Moles of KOH=10.6248

Hence

The net mole of KOH=10.6248-7.0735

The  net mole of KOH=3.5513

Volume of solution=21.5+23.3

Volume of solution=44.8ml

Generally, the equation for the  Concentration of KOH is mathematically given as

CKOH=mole/volume

Therefore

CKOH=3.5513/44.8ml

CKOH=0.07927M

In conclusion,

pOH=-log{OH-}

pOH=-log{0.07927}

pOH=1.10

pH=14-110

pH=12.90

Read more about pH value

https://brainly.com/question/15845370

Answer:

- Krypton.

- Silicon.

Explanation:

Hello.

In this case, since the first element's last term in the electron configuration is 4p⁶, by looking at the fourth period, the only element having sic 4p electrons is Kr as its electron configuration is:

[tex]Kr^{36}:1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^1^0,4p^6[/tex]

In the second case, the element of the third period having two 3p electrons or [tex]3p^2[/tex] the last term in its electron configuration is silicon as shown below:

[tex]Si^{14}:1s^2,2s^2,2p^6,3s^2,3p^2[/tex]

Best regards.

Answer:

PHYSICAL:

An example of a physical change would be clay, for instance, you take out clay you then sculpt it into a spere, this is a physical change.

CHEMICAL

An example of a chemical change is when you take vinegar then put baking soda in it, it has a chemical reaction  

hope this helped <3

Answer:

solids have definite shape and volume. liquid have definite volume but not definite shape. gases do not have definite volume as well as definite shape.

With the compounds sample mass at  150g, and we are left to decipher the proportion of Carbon, Hydrogen, and Oxygen amount, The compound's empirical formula is mathematically given as

Ep=C5H12O4

Question Parameters:

A 150 g sample of a compound is comprised of 44.07% C, 8.98% H and the remainder is O by mass

Generally, the equation for the compound  is mathematically given as

CxHyOz

Where

Therefore

O percentage is

Po100-(44.07+8.98)

Po=46.95

For Cx we determine the minimum value

hence

x=1.25*4

x=5

For Hy

y=3.0*4

For  Oz

y= 1*4

y=4

In conclusion, the empirical formula is

C5H12O4

Read more about Bonding

https://brainly.com/question/819068

Answer:

control of cancer formation and proliferation control of bacterial, fungal and microbial growth

Explanation:

Because Redox reaction are emerging as vital processes involved in cell survival and proliferation.

Answer:

It is equal to the number of moles of acid that reacted. When Oxalic acid is your limiting reactant it is the # of moles of oxalic acid used. When NaOH is your limiting reactant it is equal to the number of moles of NaOH used.

The  moles of OH⁻ that reacted in the titration can be found by;

The moles of OH⁻ used in the titration experiment is dependent on the number of moles of the limiting reactant, used during the Titration in the laboratory.  

From the data contained in the table, the limiting reactant is the oxalic acid. therefore the number of moles of OH⁻ is equal to the number of moles of oxalic acid used during titration.

Hence we can conclude that the  moles of OH⁻ that reacted in the titration can be found by determining the number of moles of oxalic acid used in the titration

Learn more : https://brainly.com/question/12056938

Answer: Yes

Explanation:

Yes, i would invest in this idea, Because the procedure looks very lucrative. Because the initial extraction of the energy from the ground requires no fossil fuel to keep the device running or in operation, rather the heat extracted would be used to heat a heat pump which would boil into steam and in turn used to drive a or power a steam engine.

Answer:

[tex]\%NaHCO_3=61.2\%[/tex]

Explanation:

Hello.

In this case, since the reaction between sodium bicarbonate and a symbolic HA is:

[tex]NaHCO_3+HA\rightarrow NaOH+CO_2[/tex]

For 0.561 g of carbon dioxide (molar mass = 44 g/mol) we can compute the required mass of sodium bicarbonate (molar mass = 84 g/mol ) via stoichiometry:

[tex]m_{NaHCO_3}=0.561gCO_2*\frac{1molCO_2}{44gCO_2}*\frac{1molNaHCO_3}{1molCO_2}* \frac{84gNaHCO_3}{1molNaHCO_3}\\ \\m_{NaHCO_3}=1.071gNaHCO_3[/tex]

Then, the percent by mass of sodium bicarbonate in the original mixture is obtained by dividing the mass of the sodium bicarbonate from which the CO2 was yielded by the total mass of the mixture:

[tex]\%NaHCO_3=\frac{1.071g}{1.75g}*100\%\\ \\\%NaHCO_3=61.2\%[/tex]

Best regards.

Answer:

causing the particles to move faster and farther apart.

Explanation:

hope this helps

As the kinetic energy possessed by the particles of matter increases and so does the distance, hence particles tend to move faster.

Kinetic energy is "a form of energy that an object or a particle has by reason of its motion".

Particle is "a small portion of matter".

What is matter?

Matter is "anything that occupies space and has mass".

What is distance?

Distance of "an object can be defined as the complete path travelled by an object".

Hence, the kinetic energy of particles of matter increases with the increase in the distance between the particles.

To learn more about Kinetic energy here

https://brainly.com/question/18592807

#SPJ2

Answer:

it is actually false

Explanation:

Answer:

Add a few drops of indicator to your flask. Perhaps you forgot to add them.

Explanation:

The  next thing you should do to troubleshoot this problem is to add an indicator which is responsible for color change.

Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.

These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:

1) natural indicators

2) synthetic indicators

3) olfactory indicators.

These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.

Learn more about indicator,here:

https://brainly.com/question/29016702

#SPJ6

Answer:

342.29648 g/mol

Explanation:

Mass of sugar C₁₂H₂₂O₁₁ is required to provide 2.50 x 10²³ molecules of O₂ is 11.84.

Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.

No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.

Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.

Reaction is-

C₁₂H₂₂O₁₁ + 12O₂ → 12CO₂ + 11H₂O

1 mole of C₁₂H₂₂O₁₁ forms 12 moles of O₂.

12 × 6.02214076 × 10²³ molecules of O₂ formed by 342.3 g of C₁₂H₂₂O₁₁.

1 molecule of O₂ formed by 4.73 × 10⁻²³  g of C₁₂H₂₂O₁₁.

2.50 × 10²³ molecules of O₂ formed by 11.84 g of C₁₂H₂₂O₁₁.

Therefore, Mass of sugar C₁₂H₂₂O₁₁ is required to provide 2.50 x 10²³ molecules of O₂ is 11.84.

Learn more about mole concept, here:

https://brainly.com/question/31123980

#SPJ2

Answer:

the answer would be (c) it does not have to take in nutrients

Explanation:

Answer:

c

Explanation:

it does not have nutrients

Answer:

the answer is A it just told me

Explanation:

the quiz told me the correct answer  

Considering the definition of polar molecule, Br has a negative partial charge and H a ​​positive partial charge.

The bond dipole moment can then be defined as the magnitude of the polarity in a bond. This moment represents the distribution of electron density in a bond.

The distribution of charges is due to the fact that the atoms that form them have different electronegativity, in such a way that when a covalent bond is created and the electrons are shared, the electrons of the bond are attracted with different force by the atoms that share them.

Then, a polar molecule is one that is neutral, that is, it does not have a net charge. But it has an internal distribution of charges that form a partially positive region and a partially negative region.

That is, polar bonds are established between atoms of different electronegativity, so that the atom with higher electronegativity will attract the electrons towards itself, giving rise to two opposite charges in the bond and  creating a negative charge on the atom because the electrons have negative charge.

In this way, in a polar molecule there is separation between positive and negative charges. The bonds will be the more polar the greater the electronegativity difference between the bonded atoms.

In this case,  bromine Br has a higher electronegativity and attracts electrons shared with hydrogen H more strongly. Then Br has a negative partial charge and H a ​​positive partial charge.

Learn more:

This reaction produces a white precipitate. It is silver chloride:

[tex]AgNO_{3} + NaCl[/tex] → [tex]AgCl[/tex]↓ [tex]+[/tex] [tex]Na^{+} + NO^{-} _{3}[/tex]

Answer:

No of moles of fe2o3 = 16.5/(55.8x2+16x3)=0.103mols

No. Of moles of iron= 0.103 x 2 = 0.206mols

Mass of iron = 0.206 x 55.8 = 11.5g

Explanation:

Sry if I'm wrong