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17.12.2020 •
Chemistry
13.
Nitrogen dioxide is a gas that can be generated by emissions from vehicles and factories. It
can also be generated by natural sources, such as forest fires, lightning, and microblal activity
in soll. The equation for producing nitrogen dioxide is shown below.
2NO
Colorless
O2
Colorless
2N02
Brown
gas
gas
gas
Which of these provides evidence that a chemical reaction occurs?
A A gas is present.
B The total number of atoms remains unchanged.
C The state of matter remains the same.
D A brown gas is produced.
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Ответ:
Well first loose weight L
Ответ:
Explanation:
it is the first one
because