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soldi70 [24.7K]
3 years ago
7

Which of the answer choices best describes elements?

Chemistry
1 answer:
lianna [129]3 years ago
4 0
It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, butcarbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.

I would say d.
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A soft drink contains 63 g of sugar in 378 g of H2O. What is the concentration of sugar in the soft drink in mass percent
Doss [256]

Answer:

\% m/m= 14.3\%

Explanation:

Hello,

In this case, the by mass percent is computed as shown below:

\% m/m=\frac{m_{solute}}{m_{solute}+m_{solvent}} *100\%

Whereas the solute is the sugar and the solvent the water, therefore, the concentration results:

\% m/m=\frac{63g}{63g+378g} *100\%\\\\\% m/m= 14.3\%

Best regards.

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Mnenie [13.5K]

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5 0
3 years ago
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According to the following electron structure, how many valence electrons do these fluorine atoms have? F= 1s12s22p5
ddd [48]
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6 0
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