5.31 g of lithium contains 4.567 x 10^23 atoms.
The average mass (in grams) of one calcium, Ca, atom is 6.64 * 10^-23 g.
The average mass (in grams) of one mole of Ca atoms is 40.0 g.
What is the mass in grams of 4.567 x 10^23 atoms of lithium?
The molar mass of lithium is 7.0 g
One mole of lithium atom contains 6.02 * 10^23 atoms.
6.02 * 10^23 atoms of lithium weighs 7.0 g
4.567 x 10^23 atoms of lithium will weigh 4.567 x 10^23 * 7.0 g/6.02 * 10^23 = 5.31 g
Therefore, 5.31 g of lithium contains 4.567 x 10^23 atoms.
What is the average mass (in grams) of one calcium, Ca, atom?
6.02 * 10^23 atoms of calcium weigh 40.0 g
1 atom will weigh 1 * 40.0 g/6.02 * 10^23 = 6.64 * 10^-23 g
Therefore, the average mass (in grams) of one calcium, Ca, atom is 6.64 * 10^-23 g.
What is the average mass (in grams) of one mole of Ca atoms?
The molar mass of calcium is 40.0 g
Therefore, the average mass (in grams) of one mole of Ca atoms is 40.0 g.
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