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Oksi-84 [34.3K]
4 years ago
15

Anyone know numbers 1-13

Chemistry
1 answer:
vekshin14 years ago
5 0
Question 1 is false, new substances are formed when a chemical change takes place. The other two you've answered are true to my knowledge. Question 5 and 7 are also true I think.
Question 2 should be a physical change and flammability is a chemical property (question 4); I can't really read the other questions too well.
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<h3>How to determine the mass</h3>

The formula for quantity of energy is given thus;

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Where n represents number of moles

HF  represents  heat of fusion

To find the number of moles, we have

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Let's note that;

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Learn more about molar heat of fusion here:

brainly.com/question/15634085

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