Q. 95.0( 3 Votes )

Which of the following would weigh the highest?
A. 0.2 mole of sucrose (C12H22O11)

B. 2 moles of CO2

C. 2 moles of CaCO3

D. 10 moles of H2O

Answer :

A. 0.2 mole of sucrose (C12H22O11):


Given: Number of moles = 0.2


Molar mass of C12H22O11 = 342 g/mol


To find out the mass of sucrose, apply the formula given:




Mass = 0.2 mol × 342g/mol


Mass = 68.4g


Thus, the mass of sucrose is 68.4 g.


B. 2 moles of CO2:


Given: Number of moles = 2


Molar mass of CO2 = 44 g/mol


To find out the mass of sucrose, apply the formula given:




Mass = 2 mol × 44g/mol


Mass = 88g


Thus, the mass of CO2 is 88 g.


C. 2 moles of CaCO3:


Given: Number of moles = 2


Molar mass of CaCO3 = 40 + 12 + 3× 16 = 100 g/mol


To find out the mass of sucrose, apply the formula given:




Mass = 2 mol × 100g/mol


Mass = 200g


Thus, the mass of CaCO3 is 200 g.


D. 10 moles of H2O:


Given: Number of moles = 10


Molar mass of H2O = 18 g/mol


To find out the mass of sucrose, apply the formula given:




Mass = 10 mol × 18g/mol


Mass = 180g


Thus, the mass of H2O is 180 g.


Hence, the option C is correct which has higher mass.

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