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tatuchka [14]
3 years ago
15

What methods do scientists use to determine if a change was physical or chemical?

Chemistry
1 answer:
Bess [88]3 years ago
5 0
A physical change will not change the chemical make-up of the material. the change will not produce a new substance.

a chemical change will have a reaction that produces heat, light, a change in color, releases a gas, or rust
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What is the arrow in a chemical equation...H2 + O --> H2Ob
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How many moles of nitrogen gas (N) are needed to react with 7.5 moles of hydrogen (H)?
Monica [59]

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Explanation:

7 0
2 years ago
Which statement illustrates the difference between a chemical reaction and a nuclear reaction?A nuclear reaction releases more e
denpristay [2]

According to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

<h3>What is a nuclear reaction?</h3>

It is a procedure that leads to combining and modifying the nuclei of atoms and subatomic particles and appears to violate the law of conservation of mass.

Through this kind of process, the nuclei can be combined or fragmented, absorbing or releasing particles and energy according to each case.

Therefore, we can conclude that according to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

Learn more about nuclear reactions here: brainly.com/question/1480032

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4 0
2 years ago
HELPP!<br> how many grams are in 1.50 x 10(24) atoms of copper?
svlad2 [7]

Answer:

2266g

Explanation:

mass = no.of molecules /6.o23*1o(23) * molar mass

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1.5 .10^25/6.023 .10^23 =51.5 moles of co2

51.5 .44g/mol =2266 g

4 0
3 years ago
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