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grandymaker [24]
2 years ago
7

All of the following are physical properties except a. density b. colour c. reaction with oxygen d. melting point

Chemistry
2 answers:
Crank2 years ago
7 0
C! That’s a chemical change :)
denpristay [2]2 years ago
4 0

Answer:

C

Explanation:

a, b and d   are physical properties ..... the compound or element in question has not changed its identity

   c    when combined with oxygen, it has changed to a different compound via CHEMICAL property.

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How much aluminum oxide and how much carbon are needed to prepare 573 g of aluminum by the balanced chemical reaction (below) if
yawa3891 [41]

Answer:

1387.2g of Al2O3

Explanation:

The number of moles of aluminum oxide required to give the actual yield is obtained from the given mass of aluminum produced by the reaction. The percentage yield is used to obtain the theoretical yield of the aluminum. The number of moles produced theoretically can be used to calculate the amount of aluminum oxide required in moles and when we multiply the value obtained by the molar mass of aluminum oxide, we obtain the mass of aluminum oxide required.

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3 years ago
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22.99 on the element sodium means the combined numbers of electrons and protons?
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3 years ago
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Answer:

Answer:

a plant cell

Explanation:

because the chrolopast is green

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6 0
2 years ago
Why do strong bonds exist between water molecules? They have nonpolar structure. They are held together by hydrogen bonds. The h
Zolol [24]

Answer:

They are held together by hydrogen bonds

Explanation:

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Hydrogen bonds are very effective in binding molecules into larger units. Most substances that joins with hydrogen bonds have a higher boiling point and lower volatility.

This is why we have a strong intermolecular bond between water molecules.

5 0
3 years ago
The average person in the United States is exposed to the following amount of radiations annually. Rank the following source of
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