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2 years ago

Which of these is not a gas? hydrogen, oxygen, gravity, or helium

Chemistry

2 answers:

katrin2010 [14]2 years ago

8 0

Answer:

I think that Gravity is not considered a gas but it can at the same time

Explanation:

Gasses are affected by gravity, as above video will prove. ... Yes, there is a attractive force between the gas molecules and gravity !

The rest are for sure gases

Sholpan [36]2 years ago

7 0

Answer: Gravity.

Explanation: Gravity is what holds the earth's atmosphere to it (which is a mixture of gases). For example, Moon doesn't have an atmosphere only because of a weak gravitational field but that doesn't mean that gravity can be considered as a gas.

Other options (Oxygen, Hydrogen and Helium) are all gases.

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How long would it take to produce enough aluminum to make a case (24 cans) of aluminum soft drink cans if each can used 3 g of a

kozerog [31]

Answer : It takes time to produce 3 g of aluminium is, 165 seconds.

Explanation :

As we are given that the mass of aluminium is, 3 grams. Now we have to calculate the total mass of aluminum.

Total mass of aluminum = 3g × 24 = 72 g

Now we have to calculate the moles of aluminum.

$\text{Moles of Al}=\frac{\text{Mass of Al}}{\text{Molar mass of Al}}$

Molar mass of Al = 27 g/mol

$\text{Moles of Al}=\frac{72g}{27g/mol}=2.67mol$

As, 1 mole of Al has 3 Faradays

So, 2.67 mole of Al has = $2.67\times 3=80.1$ Faradays

and,

Charge = $80.1\text{ Faradays}\times \frac{96500\text{ coulombs}}{1\text{ Faradays}}=7.73\times 10^6\text{ coulombs}$

Current = $5.00\times 10^4A\times \frac{93.9}{100}=46950A$

Now we have to calculate the time.

$Time=\frac{Charge}{Current}=\frac{7.73\times 10^6}{46950}=164.6s\aaprox 165s$

Hence, it takes time to produce 3 g of aluminium is, 165 seconds.

5 0

2 years ago

What is the main reason that Absolute Zero has not been achieved under laboratory conditions?

Alexeev081 [22]

Answer:

The reason is because Charle's Law which states that volume is directly proportional to temperature. So, for the temperature to be absolute zero, there would need to be no volume. It's Impossible.

Explanation:

3 0

3 years ago

Which of the following has mechanical energy?

NNADVOKAT [17]

A compressed spring would have mechanical energy cause it generates from the force being built up in the spring

5 0

2 years ago

An iron atom has an atomic mass of 56. Its atomic number is 26. How many neutrons does the iron atom have?

Ghella [55]

Answer:

Explanation:

atomic mass = proton number + neutron number

proton number is also atomic number

8 0

2 years ago

What is the formula for potassium sulfide? <br> a. k2s2 <br> b. k2s <br> c. ks <br> d. ks2

wlad13 [49]

The formula for potassium sulfide is K2S

4 0

3 years ago

Read 2 more answers