The mass of C8H18 is 4.788g
In chemistry,
The number of moles of a compound is given as Mass/ Molar mass
For C8H18, The molar mass will be calculated as
C8H18=12 x 8 +1 x 18=96+18=114 g/mol
Putting the value in the equation
Number of moles= Mass/Molar mass
0.042moles =Mass/ 114g/mol
Mass=0.042 x 114=4.788g
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