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A scientist has samples of both nitrogen (N2) and hydrogen (H2). Both of these substances are odorless, colorless gases at room temperature. The scientist places the samples into a closed flask and heats the flask. A colorless gas that has a strong odor forms. Which of these best describes what happened?'
A.
A new element formed when oxygen and nitrogen atoms turned into new kinds of atoms.
B.
A mixture formed when nitrogen and hydrogen combined.
C.
A new compound formed when nitrogen and hydrogen chemically reacted.
D.
A pure substance that is chemically identical to both nitrogen and oxygen formed.

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C.  A new compound formed when nitrogen and hydrogen chemically reacted.

Explanation:

When you mix nitrogen N₂ and hydrogen H₂ into a closed flask and you increase the temperature they will start reacting forming ammonia NH₃. Ammonia gas is colorless and have a strong smell while the nitrogen and hydrogen are colorless gases but they have no odor.

The chemical reaction:

N₂ + 3 H₂ ⇔ 2 NH₃

Usually at industrial scale a catalyst is used and the reaction is controlled by a modifying temperature and pressure with the right amounts.

Learn more about the ammonia production:

brainly.com/question/12927445

#learnwithBrainly

Answer:

C.  A new compound formed when nitrogen and hydrogen chemically reacted.

Explanation:

One example of a characteristic property of a substance is its odor. At room temperature, both nitrogen (N2) and hydrogen (H2) are both odorless. However, a strong odor was formed when these two substances were combined in a closed flask and heated. This indicates that a new compound formed when nitrogen and hydrogen chemically reacted.

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