Question

A flask contains 4.4 g of CO2 gas. calculate, (a)how many moles of CO2 gas does it contain?
( b) how many molecules of CO2 gas are present in the simple?
( c) how many atoms of oxygen are present in the given sample? (Atomic mass of C =12 u, O=16 u)

Answer 1

Answer:

a) molar mass of carbon dioxide=44g

1mole of carbon dioxide=44g

no. of moles = given mass/molar mass

= 4.4/44= 0.1 mole

b) no. of molecules= no. of moles * avagandro no.

0.1*6.02*10^23

=0.602*10^23

Explanation:

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