Question

Calculate the mass of 220cm cube of oxygen at stp

Answer 1

Answer:- 0.31 grams

Solution:- The volume of oxygen gas is given as $220cm^3$  at STP and we are asked to calculate the mass.

STP stands for standard temperature and pressure. At STP, the volume of 1 mole of a gas is 22.4 L. The molar mass of oxygen gas is 32 gram per mole. Using this information we can calculate the mass for the given volume of oxygen.

Few important conversion factors that would be used here are:

$1cm^3$ = 1 mL

and 1000 mL = 1 L

The calculations are shown below using dimensional analysis.

$220cm^3(\frac{1mL}{1cm^3})(\frac{1L}{1000mL})(\frac{1mole}{22.4L})(\frac{32g}{1mole})$

= 0.31 g

So, the mass of $220cm^3$ of oxygen gas at STP is 0.31 grams.

Answer 2

Answer:

ans. 0.31 gram

Explanation:

hope it will help you...