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vekshin1
2 years ago
13

what is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g​

Chemistry
1 answer:
LekaFEV [45]2 years ago
4 0

Answer:

K8S4O16 or K8(SO4)4 depending on if the SO4 is supposed to represent sulfate or not

Explanation:

Find the molar mass of K2SO4 first:

2K + S + 4O ≈ 174 g/mol

Divide the goal molar mass of 696 by the molar mass of the empirical formula:

696 / 174 = 4

This means you need to multiply everything in the empirical formula by 4:

K2SO4 --> K8S4O16 or K8(SO4)4 depending on if the SO4 is for sulfate or not

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I and III - Structural isomers

I and IV - structural isomers

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The knowledge of Isomerism is tested here; there are two types of isomerism ; structural and stereoisomerism.

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  • Relationship between I and III is that they are structural isomers with similar molecular formular but differ in the double bond position.
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  • Relationship between II and IV is that they are also structural isomers with the same molecular formular but different double bond position.
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