ПОМОГИТЕЕЕ...... срочно

Question

ПОМОГИТЕЕЕ...... срочно

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Answer 1

M(H2O) = 1*2 + 16= 18
M(CO2) = 12 + 16*2 = 44
M(NO2) = 14 + 16*2 = 48
M(H2S) = 1*2 + 32 = 34
M(MgCO3) = 24 + 12 + 16*3 = 84