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Chemistry
Teagan Davidson
17 April, 17:19
4.81*10^24 atoms of lithium
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Jaydon Wade
17 April, 19:39
0
Mass = 55.52 g
Explanation:
Given dа ta:
Number of atoms of Li = 4.81*10²⁴ atom
Number of grams = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms, ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 * 10²³ is called Avogadro number.
For example,
1.008 g of hydrogen = 1 mole = 6.022 * 10²³ atoms of hydrogen
For Li:
4.81*10²⁴ atom * 1 mol / 6.022 * 10²³ atom
8 moles
Mass in gram:
Mass = number of moles * molar mass
Mass = 8 mol * 6.94 g/mol
Mass = 55.52 g
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