Question

Given 4.8 moles of a gas in a 1.8 L container, if the temperature is found to be 31 degrees Celsius, what is the pressure of the gas? (The ideal gas constant is 0.0821 L · atm/mol · K and 1 atm = 760 torr.)
Answer

6.79 torr

66.55 torr

6.79 x 100 atm

6.66 x 101 atm

Answer 1

When calculating, I got 66.58... Should I multiply that by 10^-1 to get the fourth answer or is the answer 66.55 torr?

Answer 2

@abb0t @Preetha

Answer 3

Use the ideal gas law formula: \(\sf \color{red}{PV = nRT}\)
where
P = pressure
V = volume
n = mole
R = gas constant
T = temperature

Since you want to find \(\sf \color{green}{P}\), you need to rearrange the formula around, meaning divide by volume.

Answer 4

Like I said, I calculated and got 66.58~, do I then multiply that by 10^-1 to get 6.66 * 10^1 atm?

Answer 5

@abb0t

Answer 6

I do not have a calculator with me, but if you followed what I did, you should be correct.

Answer 7

Okay, thanks.

Answer 8

Check your units. If you use the given R as a constant, the P should be in atm. T should be in K (Celsius+273.15). And then it is math.