Question

Calculate the mass of 1 cm3 of oxygen kept at STP.

Answer 1

The mass of 1 $\bold{cm^3}$ of oxygen kept at STP is $\bold {1.428}$ mg

Explanation:

Given:

Ideal gas volume, $V = 1 cm^3 = 10^{-3} m^3$

Ideal gas temperature, T = 0°C = 273 K

Solution:

we know that

Using the ideal equation for gas we get

$n=\frac{PV}{RT}$

Where  

T is temperature of ideal gas  

V is the volume of ideal gas  

P is the pressure  

$n=\frac{1 \times 1 \times 10^{-3}}{0.082 \times 273}$

$n=\frac{1 \times 10^{-3}}{22.386}$

$n=\frac{1 \times 10^{-3}}{22.386}$

$n=\frac{10^{-3}}{22.4}$

$m a s s=\frac{10^{-3} \times 32}{22.4}$ grams

$=1.428 \times 10^{-3} \mathrm{g}$

$=1.428 \mathrm{mg}$

1.428 mg  the mass of 1 $cm^3$ of oxygen kept at STP

Answer 2

$\huge{\boxed{\mathcal\pink{\fcolorbox{red}{yellow}{Answer}}}}$

The mass of 1cm cube of oxyegen kept at STP is

1.428 mg