Question

what is the relative formula mass (Mr) of MgCl 2

Answer 1

Answer:

95.21 g/mol

Hence molar mass (M) of Magnesium Chloride; MgCl. = M (2Cl)+M (Mg) = 70.90+24.31=95.21 g/mol.

Explanation:

The molar mass of magnesium chloride is 95.211 g/mol.

and

Calculating relative formula mass

The relative formula mass of a substance made up of molecules is the sum of the relative atomic masses of the atoms in the numbers shown in the formula . Relative formula mass has the symbol, M r. ... add together the A r values for all the atoms of each element present.

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Answer 2

Answer:

1) Molar mass (M) of Magnesium (Mg) = 24.31 g/mol

2) Molar mass (M) of Chlorine (Cl) = 35.45 g/mol,

since we have two chorine atoms in this particular molecule,

3) we simply multiply the molar mass of 1 Cl atom by 2 so that we have 70.90 g/mol of Cl.

Hence molar mass (M) of Magnesium Chloride; MgCl.= M (2Cl)+M (Mg) = 70.90+24.31

= 95.21 g/mol