Question

calculate number of molecules present in 11.2 litre of carbon dioxide

Answer 1

HI there !!

No : of moles = Given volume / Molar volume

Given volume = 11.2 litres
Molar volume = 22.4 litres

No : of moles= 11.2 / 22.4 = 0.5 moles

No : of molecules = No: of moles x Avogadro number

= 0.5 × 6.022 × 10²³
= 3.011 × 10²³ molecules of CO₂

Answer 2

Hi Friend
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1mole of CO2 = 44g 
1 mole of CO2 = 22.4 liters at STP
0.5 moles of CO2=11.2 litres at STP
in 22.4 liters of  CO2 = 6.022 x 10 ^23 molecules 
in 11.2 litres  of CO2 = 1/2 x 6.022 x 10 ^23 molecules 
In 11.2 liters  of CO2 = 3.011 X 10 ^23 molecules
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