N. Calculate the number of moles of magnesium oxide, MgO in i. 80 g and ii. 10 g of the compound.

4) Solve problems

N. Calculate the number of moles of magnesium oxide, MgO in i. 80 g and ii. 10 g of the compound. (Average atomic masses of Mg = 24 and O = 16)

Asked 21 Apr 2021 Student doubt 11th1q4 Save WhatsApp Report

1 answer

Best answer

Molar mass of MgO= (atomic mass of Mg)+(atomic mass of O)

=24+16

=40 g/mol

1) 80g of MgO

number of mol = \(Given \space mass \over Molar \space mass\)

=\({80\over 40}=2mol\)

2) 10 g of MgO

number of mol =\(Given \space mass \over Molar \space mass\)

=\({10\over 40}=0.25 mol\)

Doubtly · 21 Apr 2021 Report

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