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Which of the following weighs least ? a - 2.0 gram mole of CO2 b - 0.1 mole of sucrose ( C12H22O11) c - 1 gram atom of calcium d - 1.5 mole of water What is the method of calculating this question can u please answer me in detail?
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Which of the following weighs least ? a - 2.0 gram mole of CO2 b - 0.1...
Calculation of Weights of Given Substances
a) 2.0 gram mole of CO2
Molar mass of CO2 = 12.01+2(16) = 44.01 g/mol
Weight of 2.0 mole of CO2 = 2.0 x 44.01 g = 88.02 g
b) 0.1 mole of sucrose (C12H22O11)
Molar mass of C12H22O11 = 12(12.01) + 22(1.01) + 11(16.00) = 342.30 g/mol
Weight of 0.1 mole of C12H22O11 = 0.1 x 342.30 g = 34.23 g
c) 1 gram atom of calcium
Molar mass of calcium = 40.08 g/mol
Weight of 1 gram atom of calcium = 1 x 40.08 g = 40.08 g
d) 1.5 mole of water
Molar mass of water = 2(1.01) + 16.00 = 18.02 g/mol
Weight of 1.5 mole of water = 1.5 x 18.02 g = 27.03 g
Calculation of the Lightest Substance
The weight of the lightest substance among the given substances is the least. Therefore, the substance with the least weight is:
b) 0.1 mole of sucrose (C12H22O11) which weighs 34.23 g.
Therefore, the answer is option (b).
Explanation
The given substances have different molar masses and mole quantities. A mole is a unit of measurement used to express the amount of a chemical substance. It is defined as the amount of a substance that contains the same number of entities (such as atoms, molecules, or ions) as there are atoms in 12 grams of pure carbon-12.
To calculate the weight of a given substance, we need to know its molar mass and mole quantity. We can then use the formula:
Weight = Molar mass x Mole quantity
Using this formula, we calculated the weights of the given substances and compared them to determine the lightest substance. Sucrose (C12H22O11) has the least weight among the given substances, making it the lightest substance.
a) 2.0 gram mole of CO2
Molar mass of CO2 = 12.01+2(16) = 44.01 g/mol
Weight of 2.0 mole of CO2 = 2.0 x 44.01 g = 88.02 g
b) 0.1 mole of sucrose (C12H22O11)
Molar mass of C12H22O11 = 12(12.01) + 22(1.01) + 11(16.00) = 342.30 g/mol
Weight of 0.1 mole of C12H22O11 = 0.1 x 342.30 g = 34.23 g
c) 1 gram atom of calcium
Molar mass of calcium = 40.08 g/mol
Weight of 1 gram atom of calcium = 1 x 40.08 g = 40.08 g
d) 1.5 mole of water
Molar mass of water = 2(1.01) + 16.00 = 18.02 g/mol
Weight of 1.5 mole of water = 1.5 x 18.02 g = 27.03 g
Calculation of the Lightest Substance
The weight of the lightest substance among the given substances is the least. Therefore, the substance with the least weight is:
b) 0.1 mole of sucrose (C12H22O11) which weighs 34.23 g.
Therefore, the answer is option (b).
Explanation
The given substances have different molar masses and mole quantities. A mole is a unit of measurement used to express the amount of a chemical substance. It is defined as the amount of a substance that contains the same number of entities (such as atoms, molecules, or ions) as there are atoms in 12 grams of pure carbon-12.
To calculate the weight of a given substance, we need to know its molar mass and mole quantity. We can then use the formula:
Weight = Molar mass x Mole quantity
Using this formula, we calculated the weights of the given substances and compared them to determine the lightest substance. Sucrose (C12H22O11) has the least weight among the given substances, making it the lightest substance.
Community Answer
Which of the following weighs least ? a - 2.0 gram mole of CO2 b - 0.1...
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Which of the following weighs least ? a - 2.0 gram mole of CO2 b - 0.1 mole of sucrose ( C12H22O11) c - 1 gram atom of calcium d - 1.5 mole of water What is the method of calculating this question can u please answer me in detail?
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