Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of
the Moon. How should he position them to show a New Moon?

Kevin Is Working On A Model That Shows The Positions Of Earth, The Moon, And The Sun During The Phases

Answers

Answer 1

Answer:

Explanation:what’s the answer

Answer 2

Answer: A. With Earth between the Moon and the Sun.

Explanation:


Related Questions

The irreversible elementary gas-phase reaction is carried out isothermally at 305 K in a packed-bed reactor with 100 kg of catalyst. The entering pressure was 20 atm and the exit pressure is 2 atm. The feed is equal molar in A and B and the flow is in the turbulent flow regime, with F A0 10 mol/min and C A0 0.4 mol/dm 3 . Currently 80% conversion is achieved. What would be the conversion if the catalyst particle size were doubled and everything else remained the same

Answers

Answer:

0.856

Explanation:

Given data:

Feed molar rate ( Fao ) = 10 mol/min

Feed concentration ( Cao ) = 0.4 mol/dm^3

current conversion rate = 80%  

Temperature = 305 K

catalyst = 100 kg

entering pressure = 20 atm

exit pressure = 2 atm

Determine the conversion if the catalyst particle size were doubled and everything else remained the same

The conversion if the catalyst particle size were doubled and other factors remains the same = 0.856

attached below is a detailed solution

A substance that does not dissolve in a solvent is said to be:
A. insoluble
B. immiscible
C. miscible
D. soluble

Answers

A is the I think 83388

Respiration occurs at the cellular level
truebor false?​

Answers

the answer is : False

just did it

What is the mass of 500 trillion (5.0 x 10'4)
molecules of water?

Answers

15 x 10^-9 grams or 0.000000015 grams

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, diethylamine, methyl acetate, ethanolamine, and dimethyl sulfoxide.

The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information:

Liquid Density
Tetrahydrofuran 0.89·gcm^−3
Carbon tetrachloride 1.6·gcm^−3
Pentane 0.63·gcm^−3
Dimethyl sulfoxide 1.1·gcm^−3
Acetone 0.79·gcm^−3.

Next, the chemist measures the volume of the unknown liquid as 0.852L and the mass of the unknown liquid as 938.g . Calculate the density of the liquid.

Answers

Answer: The density of the liquid is [tex]1.10g/cm^3[/tex]

Explanation:

Density is defined as the mass contained per unit volume.

[tex]Density=\frac{mass}{Volume}[/tex]

Given : Mass of the unknown liquid  = 938 grams

Volume of the unknown liquid = [tex]0.852L=852cm^3[/tex]  [tex](1L=1000cm^3[/tex]

Putting in the values we get:

[tex]Density=\frac{938g}{852cm^3}[/tex]

[tex]Density=1.10g/cm^3[/tex]

Thus the density of the liquid is [tex]1.10g/cm^3[/tex] and the liquid is dimethyl sulfoxide.

Which statement best describes how matter and energy is cycled through the ecosystem?
A. Energy is recycled in an ecosystem, but matter is not recycled.
B. Matter and energy are both cycled throughout an ecosystem, and much of the energy at each level is changed to heat energy.
C. Energy is gained in each level on the energy pyramid, and matter is lost in an ecosystem.
D. Matter and energy are the same.

Answers

D. Matter and energy are the same.

(22 points) please please help me thanks so much

Answers

Answer:

d

Explanation:

Answer:

hopen it helps soo much thanks for the points

9.
Which of the following samples contains the greatest number of atoms?
a. 1 mole of CO2
c. 3 moles of N20
b. b. 2 moles of He
d. 4 moles of CO​

Answers

Answer:

N2O.

Explanation:

Hello there!

In this case, according to the Avogadro's number, we can compute the number of atoms, taking into account that CO2 has three moles of atoms, N2O has three moles of atoms, He one mole of atoms and CO two moles of atoms:

[tex]atoms_{CO_2}=1molCO_2*\frac{3*6.022x10^{23}atoms}{1molCO_2}=1.81x10^{24}atoms\\\\atoms_{N_2O}=3molN_2O*\frac{3*6.022x10^{23}atoms}{1molN_2O}=5.4x10^{24}atoms\\\\atoms_{He}=2molHe*\frac{1*6.022x10^{23}atoms}{1molHe}=1.2x10^{24}atoms\\\\atoms_{CO}=4molCO*\frac{2*6.022x10^{23}atoms}{1molCO}=4.82x10^{24}atoms[/tex]

Thus, we infer that 3 moles of N2O have the greatest number of atoms.

Guys please help me i will mark brainly!

Answers

Answer:

D

Explanation:

Go to the Phase Changes tab. Select the particular molecule, and set the temperature to the given values by using the stove to increase or decrease the temperature. Increase the pressure of the cylinder by moving the lid of the cylinder down with the help of the finger. The pressure of the cylinder is indicated by the pressure gauge on the top left corner of the simulation. On the right-hand side of the simulation is the phase diagram for the molecule.
As the molecules collide on the walls of the cylinder, the pressure of the cylinder does not remain constant; it fluctuates slightly as indicated by the gauge.
In the phase diagram, observe the red point. When a particular molecule is selected, set the temperature and pressure condition to the required value. Observe the position of the red point on the phase diagram when the pressure reaches approximately near the required value.
Which of the following conditions will result in the formation of a supercritical fluid?
Check all that apply.
1. Oxygen at 100 K and no pressure
2. Argon at 160 K and approximately 6 atm pressure
3. Water at 294 K and approximately 1 atm pressure
4. Neon at 32 K and approximately 1 atm pressure
5. Neon at 50 K and approximately 10 atm pressure
6. Water at 894 K and approximately 20 atm pressure
7. Argon at 100 K and no pressure
8. Oxygen at 194 K and approximately 2 atm pressure

Answers

Answer:

2. Argon at 160K and approximately 6 atm pressure

5. Neon at 50K and approximately 10 atm pressure

6. Water at 894 K and approximately 20 atm pressure

8. Oxygen at 194K and approximately 2 atm pressure

Explanation:

Super critical fluid is formed when temperature rises beyond critical point. The state of molecules can be liquid or gas. The pressure should be above the certain level with an introduction of different gases at minimum of 2 atm pressure.

What is the mass of 8.56 x 10^23 formula units of BaBr2? (3 sig figs in your answer) ​

Answers

Answer:

296 g BaBr₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

[Given] 8.56 × 10²³ formula units BaBr₂

[Solve] grams BaBr₂

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of Ba - 137.33 g/mol

[PT] Molar Mass of Br - 35.45 g/mol

Molar Mass of BaBr₂ - 137.33 + 2(35.45) = 208.23 g/mol

Step 3: Convert

[DA} Set up:                                                                                                     [tex]\displaystyle 8.56 \cdot 10^{23} \ formula \ units \ BaBr_2(\frac{1 \ mol \ BaBr_2}{6.022 \cdot 10^{23} \ formula \ units \ BaBr_2})(\frac{208.23 \ g \ BaBr_2}{1 \ mol \ BaBr_2})[/tex][DA] Multiply/Divide [Cancel out units]:                                                         [tex]\displaystyle 295.99 \ g \ BaBr_2[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

295.99 g BaBr₂ ≈ 296 g BaBr₂

Thank you agenthammerx for helping me with this question!

Answer:

296 g BaBr₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

Left to Right

Chemistry

Atomic Structure

Reading a Periodic Table

Moles

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 8.56 × 10²³ formula units BaBr₂

[Solve] grams BaBr₂

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of Ba - 137.33 g/mol

[PT] Molar Mass of Br - 35.45 g/mol

Molar Mass of BaBr₂ - 137.33 + 2(35.45) = 208.23 g/mol

Step 3: Convert

[DA} Set up:                                                                                                      

[DA] Multiply/Divide [Cancel out units]:                                                          

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

295.99 g BaBr₂ ≈ 296 g BaBr₂

Using Graham's Law of Effusion, calculate
the approximate time it would take for
1.0 L of argon gas to effuse, if 1.0 L of
oxygen gas took 12.7 minutes to effuse
through the same opening.

0.070 minutes

0.89 minutes

None of the other answers

14 minutes

12 minutes

Answers

The rate of effusion of Argon here is 8.03 min

Data;

Molar mass of Oxygen = 16g/molTime for effusion of oxygen = 12.7 minMolar mass of Argon = 40g/molTime for effusion of Argon = ?

Graham's Law of Effusion

This law states that the rate of effusion of a gas is inversely proportional to the square root of it's molar mass.

[tex]R \alpha \frac{1}{\sqrt{M} }[/tex]

From this,

[tex]\frac{r_1}{r_2} = \frac{\sqrt{M_2} }{M_1}[/tex]

substituting the values and solving,

[tex]\frac{R_A_r}{12.7}= \frac{\sqrt{16} }{\sqrt{40} } \\ R_A_r = \frac{12.7*\sqrt{16} }{\sqrt{40} } \\R_A_r = 8.032min[/tex]

The rate of effusion of Argon here is 8.03 min

Learn more on Graham's law of effusion here;

https://brainly.com/question/12211278

Help me please tell me and I try to make u brainliest!

Answers

The best option would be A I think. I’m sorry if it’s wrong

how many significant digits are in the number 1.0 × 10^3?​

Answers

121837481817381813727-
answer: 1000
1•10^3 add three 0’s

Which phrase describes air density?

increases as altitude increases
equals mass divided by volume
pushes molecules in one direction
exerts less pressure as it increases
If you answer I love you

Answers

Answer:B equals mass divided by volume

Explanation:I got hacks :)

Answer:

Which phrase describes air density? well b  

increases as altitude increases

equals mass divided by volume

pushes molecules in one direction

exerts less pressure as it increases

Explanation:

love you too!!!!!

The following image is a prediction of how an earthquake would spread from the epicenter (marked by a star). Red indicates the
worst areas, and green indicates the places where there is the least shaking. Water is colored blue. Consider a seismic wave-an
earthquake that starts in the middle of the red area and travels outward along the surface of the earth.
Image courtesy of U.S. Geological Survey
Department of the Interio/
USOS
Point A is the same distance from the epicenter as point B. Using what you know about the movement of waves, how would you
expect the seismic waves to be different at point A and point B?
OA.
The waves would be larger at point A than at point B.
OB. The waves would be exactly the same at points A and B.
OC. The waves would arrive at point B before they arrived at point A.
OD
The ground would shake up and down at point A but back and forth at point B.

Answers

Answer:

its B

Explanation:

The earthquakes are occurring more in the land region of earth surface. Hence, the waves would arrive at point B before they arrived at point.

What is an earthquake?

When two layers of the ground abruptly slide past one another, an earthquake results. The fault or fault plane is the area where they slide. The epicenter is the point on the earth's surface that is directly above the hypocenter, which is where the earthquake begins under the surface.

The energy that would typically force the blocks to move past one another is being saved up while the fault edges are glued together and the rest of the block is moving.

All that accumulated energy is released when the force of the sliding blocks ultimately displaces the resistance of the sharp edges of the fault and causes it to unstick. Like ripples on a pond, the energy radiates from the fracture in all directions as seismic waves. Therefore, point B in the land surface will first experience the seismic waves.

To find more on earthquakes, refer here:

https://brainly.com/question/29500066

#SPJ2

Oxidation-reduction (redox) reactions are reactions:______
a) in which oxidation numbers change.
b) Oxidation numbers are either real charges or formal charges which help chemists keep track of electron transfer.
c) In practice, oxidation numbers are best viewed as a bookkeeping device.
d) Oxidation cannot occur without reduction.
e) In a redox reaction the substance which is oxidized contains atoms which increase in oxidation number.
f) Oxidation is associated with electron loss (helpful mnemonic: LEO

Answers

Answer:

A. in which oxidation numbers change

Explanation:

This is because in oxidation reduction reactions or redox reactions, involves the sharing or transfer of electrons between species and the oxidation numbers changes. There is change in electrons, ions or oxidation number by gaining or lossing electrons. Increase in oxidation number is an indication of oxidation while decrease in oxidation indicate reduction.

Which body system provides protection of the brain and the spinal cord?

Answers

Answer:

The bones of the skull and spinal column

Explanation:

The central nervous system is better protected than any other system or organ in the body. Its main line of defense is the bones of the skull and spinal column, which create a hard physical barrier to injury.

Answer:

The Central Nervous System (CNS)

How many particles are in 9.58 x 1023 of potassium sulfate (K2SO4)? (5.77 x 1047 particles)

Answers

Answer:

[tex]5.77x10^{47}particles.[/tex]

Explanation:

Hello!

In this case, since we are given 9.58x10²³ moles of potassium sulfate, it is possible to compute the particles according to the Avogadro's number:

6.022x10²³

As shown below:

[tex]9.58x10^{23}mol*\frac{6.022x10^{23}}{1mol}\\\\5.77x10^{47}particles.[/tex]

Best regards!

Is the number of total molecules on the left side of a balanced equation always equal to the number of total molecules on the right side of the equation

Answers

Answer:

No

Explanation:

No, but the total mass of reactants must equal the total mass of products to be a balanced equation.

Example: Consider the following reaction ...

3H₂ + N₂ => 2NH₃ and 'amu' is atomic mass units (formula weights from periodic table)

In terms of molecules, there are 4 molecules on the left (3 molecular hydrogens (H₂) and 1 molecular nitrogen (N₂) and 2 molecules of ammonia on the right side of equation arrow. ∑reactant molecules ≠ ∑product molecules.

In terms of mass of reactants & mass of products, the 3H₂ + N₂ => 6amu + 28amu = 34amu & mass of products (2NH₃) => 2(14amu) + 6(1amu) = 34amu for sum of product masses.

∑mass reactants = ∑mass products <=> 34amu = 34amu.

The expression '∑mass reactants = ∑mass products' as applied to chemical equations is generally known as 'The Law of Mass Balance'.

In the process of performing a spectrophotometric determination of iron, an analyst prepares a calibration curve using a single-beam spectrophotometer. After preparing the calibration curve, the analyst drops and breaks the cuvette. The analyst acquires a new cuvette, measures the absorbance of the sample, and determines the %w/w Fe in the sample. Does the change in cuvette lead to a determinate error in the analysis

Answers

Answer:

Yes.

Explanation:

Yes, the change in cuvette lead to a determinate error in the analysis if the different cuvette is used for the analysis because the amount of liquid sample that is used has different volume. If both cuvette are of the same type and has no difference in their structure and size then there is error occurs in the analysis but if both cuvette are different from one another then the error will occur in the analysis. because the amount of liquid that is used has different volume.

When a hydrocarbon fuel is burned, almost all of the carbon in the fuel burns completely to form CO2 (carbon dioxide), which is the principal gas causing the greenhouse 102 ENERGY, ENERGY TRANSFER effect and thus global climate change. On average, 0.59 kg of CO2 is produced for each kWh of electricity generated from a power plant that burns natural gas. A typical new household refrigerator uses about 700 kWh of electricity per year. Determine the amount of CO2 production that is due to the refrigerators in a city with 300,000 households.

Answers

Answer:

1.239 * 10^8 Kg

Explanation:

Since all the electricity consumed comes from natural gas;

amount of electricity consumed = 700 * 300,000 = 2.1 * 10^8 kWh

So, amount of CO2 consumed is given by;

amount of electricity consumed * amount of CO2 per kWh

Hence,

Amount of CO2 = 2.1 * 10^8 kWh * 0.59 = 1.239 * 10^8 Kg

5. Given the formula of a substance:
H Hн H
IT
C-C-C=C
1
H
H
What is the total number of shared electrons in a
molecule of this substance?
A) 22
B) 11
C) 9
D) 6

Answers

I think A and is the answer

A) 22

In a single bond one pair of electrons is shared, with one electron being contributed from each of the atoms. Double bonds share two pairs of electrons and triple bonds share three pairs of electrons. Bonds sharing more than one pair of electrons are called multiple covalent bonds.

In the given molecule:

There are total 7 single bonds and 2 double bonds.

As we know, In a single bond one pair of electrons is shared and double bonds share two pairs of electrons.

Thus,

Total number of shared electrons in a molecule= 7*2+2*4=14+8=22

So, total number of shared electrons in a molecule is 22.

Therefore, option A) is correct.

Learn more:

brainly.com/question/20602642

A cell biologist measures the volume of a bacteria cell. The volume is 6.027x10-10 L. What is the volume in picoliters? Write your answer as a decimal.
pL

Answers

Answer:

Volume of bacteria cell into Pico liters = 60.27 Pico liters

Explanation:

Given:

Volume of bacteria cell = 6.027 x 10⁻¹⁰ L

Find:

Volume of bacteria cell into Pico liters

Computation:

1 L = 10¹² Pico liters

So,

Volume of bacteria cell = 6.027 x 10⁻¹⁰ L

Volume of bacteria cell = 6.027 x 10⁻¹⁰ x 10¹² Pico liters

Volume of bacteria cell into Pico liters = 60.27 Pico liters

Given the balanced equation representing a
reaction:
02 → 0 + 0
What occurs during this reaction?

Answers

Answer:

A molecule of oxygen breaks into two atoms of oxygen showing that the bond is being broken. When bonds break, energy is absorbed and when bonds are formed energy is released. Hence, the answer to this question is (A).

Explanation:

Imagine that you mixed flour, sugar, salt, baking powder, eggs, and milk in a bowl while making cake batter. Would the order in which you mixed the ingredients affect the total mass of the mixture?

ANSWER THIS EMEDEITLY PLEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEAAAASE


thank you ✍(◔◡◔)


(ps. this is the closest subject to science (that deals with volume, mass, and matter you know that kind of stuff )that I could find

Answers

Answer:

Explanation:

no becuase everything goes in the mass shouldn't change unless you put extra

number of molecules in lithium sulfate Li2So4​

Answers

What the question there is nun

H2SO4 + 2NaOH - H2O + Na2SO4
Use the balanced chemical equation to solve the following problems. Show all work and answer with the correct units and significant figures.
a. How many moles of sodium sulfate are produced if 13 g of sulfuric acid is used in the reaction?
b. How many molecules of water are produced if 2.0 g of sodium sulfate is produced in the above reaction?

c. What mass of sulfuric acid is required to completely react with 3.4 x 1024 formula units of sodium hydroxide?
Please help

Answers

Explanation:

The balanced equation for the reaction is given as;

2NaOH + H2SO4 → Na2SO4 + 2H2O  

a. How many moles of sodium sulfate are produced if 13 g of sulfuric acid is used in the reaction?

From the reaction;

1 mol of H2SO4 produces 1 mol of Na2SO4

Converting 13g of sulphuric acid to mol;

Number of moles = Mass /  Molar mass

Number of moles = 13g / 98.0785 g/mol

Number of moles = 0.1325 mol

Since the mol ratio is 1: 1. This means

0.1325 mol of sodium sulfate would be formed.

b. How many molecules of water are produced if 2.0 g of sodium sulfate is produced in the above reaction?

From the reaction;

1 mol of Na2SO4 is produced alongside  2 mol of H2O

Converting 2g of sodium sulfate mol;

Number of moles = Mass /  Molar mass

Number of moles = 2g / 142.04 g/mol

Number of moles = 0.01408 mol

Since the mol ratio is 1: 2. This means

0.02816 mol of water would be formed.

1 mol of water = 6.022×10^23 molecules

0.02816 mol = x

Solving for x;

x = 1.696 ×10^22 molecules

c. What mass of sulfuric acid is required to completely react with 3.4 x 1024 formula units of sodium hydroxide?

From the reaction;

1 mol of H2SO4 reacts with 2 mol of NaOH

1 mol = 6.022×10^23 units

x mol = 3.4 x 10^24 units

Solving for x;

x = 5.646 mol of NaOH

Since the mole ratio is 1:2;

5.646 mol / 2 = 2.823 mol of sulphuric acid

Converting too mass;

Mass = Number of moles * Molar mass

Mass = 2.823 mol * 98.0785 g/mol

Mass = 276.88 g

A molecule is the smallest part of a ?

Answers

Answer:

A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.

Explanation:

Answer:

A molecule is the smallest part of an element, sorry if im incorrect

How many molecules are in 450.0 grams of aluminum fluoride(AIF3)?

Answers

Answer:

It would be exactly 5.3586262014272155. But if you were to round it up it would be 5.35.

Here is the answer:)
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