The approximate composition of the atmosphere is shown in the pie-chart. which statement best describes the chart? a) the chart shows the percentages of elements in a mixture. b) the chart shows the percentages of elements in a compound. c) the chart shows the percentages of pure substances in a mixture. d) the chart shows the percentages of compounds in a pure substance.

The approximate composition of the atmosphere is shown in the pie-chart shows the percentages of pure substances in a mixture.

Atmosphere:

It is a mixture of different gases around the earth. This includes Nitrogen, Oxygen, Carbon dioxide etc.

Hence, options A, B, and D are incorrect.

Therefore, the approximate composition of the atmosphere is shown in the pie-chart shows the percentages of pure substances in a mixture.

To know more about Atmosphere,

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The pie chart is missing but going with how the atmospheric composition pie chart looks like in general:

A is wrong as some gases such as moisture and carbon dioxide are not elements.

B is wrong as air is not a compound.

D is wrong as air is not a pure substance.

The only answer left is C)  The chart shows the percentages of pure substances in a mixture.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

i think the answer is c hope this