chrisssrutter
24.02.2021 •
Chemistry
Has there ever been a time where this much snow has fallen on San Antonio? (Especially, on more than one day.)
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Ответ:
51.094 g/mol
Explanation:
We are given;
Empirical formula as M2O3Percentage of metal M by mass is 68.04%We are required to determine the molar mass of M
Step 1: Determine the percentage by Mass of Oxygen in the compound
% by mass of Oxygen = 100% -68.04%
= 31.96%
Step 2: Mass of M in the compound
Mass of oxygen in the compound = 16.0 g × 3 atoms
= 48.0 g
Therefore; 48.0 g is equivalent to 31.96% of the compound.
Thus; 68.04 % will be equivalent to a mass of ;
= (48.0 g × 68.04%) ÷ 31.96%
= 102.188 g
Step 3: molar mass of M
Mass of M in the compound is 102.188 g
But there are two atoms of M in the compound
Therefore; Molar mass of M = 102.188 g ÷ 2
=51.094 g
Thus, the molar mass of M is 51.094 g/mol