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hram777 [196]
3 years ago
6

Find the molar mass of 30Si if the average molar mass of Si is 28.09 g/mol??

Chemistry
1 answer:
Bogdan [553]3 years ago
4 0
First let's find how much 30Si in nature: 100%-92.2%-4.67%=3.13%

Average M = M(28Si) * 0.922 + M(29Si) * 0.0467 + M(30Si) * 0.0313;

Let's substitute all the values we know:

28.09 = 27.98*0.922 + 28.98*0.0467 +x * 0.0313;

x = 30.03 g/mol
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