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iren [92.7K]
3 years ago
14

WILL OFFER BRAINLIEST IF YOU CAN ANSWER THIS

Chemistry
1 answer:
AleksAgata [21]3 years ago
5 0

Answer:

3

Explanation:

Thats the correct anwers

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What is the volume of 0.20 moles of helium at STP?
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Explanation:

Given:

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To Find:

The volume of Helium at STP =?

Solution:

According to ideal gas law

PV = nRT

where

P is pressure,  

V  is volume,  

n  is the number of moles  

R  is the gas constant, and  

T  is temperature in Kelvin.

The question already gives us the values for  p  and  T ,because helium is at STP. This means that temperature is  273.15 K  and pressure is  1 atm .

We also already know the gas constant. In our case, we'll use the value of  

0.08206 L atm/K mol  since these units fit the units of our given values the best

On substituting these values we get

1 atm \times  V = 0.20 moles  \times  0.08206 L atm/K mol

V = \frac{0.20 moles  \times  0.08206 L atm/K mol }{ 1 atm}

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