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Natasha2012 [34]
3 years ago
9

Give two reasons why mixing and heating sulphur powder and iron filings on a watch glass is chemical change

Chemistry
1 answer:
Nadusha1986 [10]3 years ago
7 0

Answer:

When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has properties entirely different from Fe and S. Therefore, heating of mixture of iron and sulphur powder is a chemical change.

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3 years ago
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8 0
3 years ago
A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?
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A sample of a compound contains 60.0 g C and 5.05 g H.

divide by molar mass of C(12) and H(1) to get molar ratio

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so C:H=5:5=1:1

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