The answer is 9. Calcium nitrate is made up
of 3 different elements that equal 9 atoms.
Answer: (D) environmental chemistry
Explanation:
Answer:
Air is a good insulator because the molecules are far apart. This reduces mobility of air molecules hence conduction is difficult.
Explanation:
For other statements :
- All the suns radiations are not reflected back to space because the ozone layer of the earth's atmosphere which regulates the intensity of radiations from the sun, it is transparent and porous hence heat and light rays from sun enter earth.
- Work is only done by potential energy when the body is under free fall and experiencing gravitational force, but for a body moving without influence of gravity, work is done by the force applied and the distance moved by the body. This force is called a <em><u>c</u></em><em><u>o</u></em><em><u>n</u></em><em><u>s</u></em><em><u>e</u></em><em><u>r</u></em><em><u>v</u></em><em><u>a</u></em><em><u>t</u></em><em><u>i</u></em><em><u>v</u></em><em><u>e</u></em><em><u> </u></em><em><u>f</u></em><em><u>o</u></em><em><u>r</u></em><em><u>c</u></em><em><u>e</u></em><em><u>.</u></em>
- Total mechanical energy is given by
= <em><u>Kinetic energy + Potential energy</u></em>
Explanation:
It is known that like dissolves like. Therefore, polar solutes are soluble in polar solvents.
For example, salt is a polar compound and water is a polar solvent. Therefore, salt will dissolve in water.
On the other hand, oil is an inorganic solvent and hence, it is unable to dissolve any polar solute.
Therefore, we can conclude that following is true about the effect of polarity on solubility.
- <em>Polar solutes dissolve better in water than in oil.</em>
- <em>Polar solutes have the greatest solubility in polar solvents.</em>
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<em><u>Hope this helps!</u></em>
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