Question

Calculate the relative molecular mass of Ca(NO3)2​

Answer 1

40+2(14+48)

40+2(62)

40+124

Molecular mass is 164

Answer 2

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the molar mass of calcium nitrate is 164.0878 g/mol

there is one atom of calcium ,which as molar mass of 40.078 g/mol

there are two atoms of nitrogen ,which equals :

2(14.0067 g/mol)= 28.0134 g/mol

There are six atoms of oxygen, which equals: 6(15.9994 g/mol) = 95.9964 g/mol

Summing these individual molar masses results in:

40.078 g/mol + 28.0134 g/mol + 95.9964 g/mol = 164.0878 g/mol

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