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skad [1K]
3 years ago
9

What criteria are used to distinguish between a chemical change and a physical change

Chemistry
1 answer:
Marat540 [252]3 years ago
3 0
If the ending substance has changed its properties. For example if iron rusts it is a chemical change because it is no longer the same as before it is now just rust. A physical change only changes the appearance but burning something or changing it's chemical properties is a chemical change. 
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C3H8 +502 + 3CO2 + 4H2O
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Answer:

Explanation:

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second, the ratio if O2/C3H8 is 5 so you need to calculate O2 in moles with that:

3.0625 ÷ 5 = 0.6125

third, the amount of CO2 in moles also can be calculate by the ratio of C3H8/CO2 which is 3

0.6125 × 3 = 1.8375

then multiply CO2 in moles by its molar mass which is 44 g/mol

1.8375 × 44 = 80.85g

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Answer:

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