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Question
Which of the following would weigh the highest?
Options
0.2 mole of sucrose (C12 H22 O11)
2 moles of CO2
2 moles of CaCO3
10 moles of H2O
Solution
2 moles of CaCO3
Weight = Numberpf moles × molar mass.
0.2 mole of sucrose (C12H22O11)
= 0.2 × 342
= 68.4 g
2 moles of CO2 = 2 × 44 = 88 g
2 moles of CaCO3 = 2 ×100 = 200 g
10 moles of H2O = 10 × 18 = 180 g
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