# chemistry

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calculate the number of atoms in the following masses.
a) 54.0g of aluminum
b) 69.45 g of lathanum
c) 0.697 g of gallium
d) 0.000 000 020 g of beryllium

• chemistry -

The atomic mass of Al is 1 mol and it contains 6.02 x 10^23 atoms Al.

The atomic mass of La is 1 mol and it contains 6.02 x 10^23 atoms La.
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