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Ahat [919]
3 years ago
12

Which statements about gravity are true

Chemistry
1 answer:
Katen [24]3 years ago
7 0

Answer:

1.gravity helps us stay situated on earth without floating away  

3.gravity holds our galaxy together

4.multiplying the mass of an object by the acceleration due to gravity gives the weight of the object  

Explanation:

Man can float on moon. This is because the force of gravity on the moon is less than that on Earth. Thus gravity helps us not float away on Earth.  

All matter contains mass and has nothing to do with gravity. Option 2 is incorrect.

Gravity is a collection of billions of stars that are held together by gravity. Option 3 is correct.

Weight of the object is the product of the mass of an object and the acceleration due to gravity. Option 4 is correct.

Scientists launch space craft out of earths atmosphere  against Earth's gravity. Option 5 is incorrect.

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Explain how water might have two different densities​
MrMuchimi

Answer:

I think this is it

Water can have two different densities if it has substances dissolved in it. ... When liquid water freezes it becomes solid water or ice, which is less dense than liquid water. The fact that solid water (ice) is less dense than liquid water is evident in the way ice floats in a glass of water.

Explanation:

6 0
2 years ago
365,000,000 scientific notation
bekas [8.4K]
3.65 X 10 to the power of 8
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3 years ago
What effect does the transfer of electrons have on the nuclei of the atoms involved?
Alex777 [14]

Answer:

Chemical processes have no effect on the nucleus otherwise we would be in deep truble. GOOD LESSONS ♡

6 0
3 years ago
What solid element is black, is an electrical conductor, is brittle and is found in group 4 of the periodic table?​
elixir [45]

Answer: silicon Si, Germanium GE

Explanation:

4 0
3 years ago
fills a 500.mL flask with 3.6atm of carbon monoxide gas and 1.2atm of water vapor. When the mixture has come to equilibrium she
enot [183]

Answer:

The answer to the question is

The pressure of carbon dioxide after equilibrium is reached the second time is 0.27 atm rounded to 2 significant digits

Explanation:

To solve the question, we note that the mole ratio of the constituent is proportional to their partial pressure

At the first trial the mixture contains

3.6 atm CO

1.2 atm H₂O (g)

Total pressure = 3.6+1.2= 4.8 atm

which gives

3.36 atm CO

0.96 atm H₂O (g)

0.24 atm H₂ (g)

That is

CO+H₂O→CO(g)+H₂ (g)

therefore the mixture contained

0.24 atm CO₂ and the total pressure =

3.36+0.96+0.24+0.24 = 4.8 atm

when an extra 1.8 atm of CO is added we get Increase in the mole fraction of CO we have one mole of CO produces one mole of H₂

At equilibrium we have 0.24*0.24/(3.36*0.96) = 0.017857

adding 1.8 atm CO gives 4.46 atm hence we have

 (0.24+x)(0.24+x)/(4.46-x)(0.96-x) = 0.017857

which gives x = 0.031 atm or x = -0.6183 atm

Dealing with only the positive values we have the pressure of carbon dioxide = 0.24+0.03 = 0.27 atm

7 0
3 years ago
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