Q.

Determine the mass of 2 moles of Carbon dioxide (CO2) gas.

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a

64g

b

88g

c

44g

d

22g

answer is B.

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Detailed Solution

Given: Number of moles of carbon dioxide = 2
              The chemical formula of Carbon dioxide =CO2
Formula:  
Number of moles = Mass of substance (m)Molar mass of given substance (M)  
Solution:
Molar mass of CO2 (M)

                         = 1 X atomic mass of carbon + 2 X atomic mass of oxygen
                            = 1 X 12 + 2 X 16
                             = 44g
Number of moles of CO2 = Mass of of CO2 (m)Molar mass of of CO2 (M) 
                            2  =   m44
                      2 X 44 =   m
                           m = 88g

 The mass of 2 moles of Carbon dioxide (CO2) gas is 88g.

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Determine the mass of 2 moles of Carbon dioxide (CO2) gas.