Q. 95.0( 3 Votes )

# Which of the following would weigh the highest?

A. 0.2 mole of sucrose (C_{12}H_{22}O_{11})

B. 2 moles of CO_{2}

C. 2 moles of CaCO_{3}

D. 10 moles of H_{2}O

Answer :

A. __0.2 mole of sucrose (C _{12}H_{22}O_{11}):__

Given: Number of moles = 0.2

Molar mass of C_{12}H_{22}O_{11} = 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 CO _{2}:__

Given: Number of moles = 2

Molar mass of CO_{2} = 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 CO _{2} is 88 g.__

C. __2 moles of CaCO _{3}:__

Given: Number of moles = 2

Molar mass of CaCO_{3} = 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 CaCO _{3} is 200 g.__

D. __10 moles of H _{2}__

__O__

__:__

Given: Number of moles = 10

Molar mass of H_{2}O = 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 H _{2}O is 180 g.__

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

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