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horrorfan [7]
3 years ago
13

One type of electromagnetic radiation that could harm humans

Chemistry
1 answer:
Vladimir79 [104]3 years ago
3 0
Ultraviolet Rays ( UV rays) can harm humans because they can cause sunburn, and skin cance if you stay out in the sun for too long.
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Answer:

The correct answer is - hard water reacts to form the calcium or magnesium salt of the organic acid of the soap.

Explanation:

Soaps are made up of fatty acids or oils by treating with strong alkali and are salts of sodium and potassium. Hard water, on the other hand, has a high concentration of minerals in comparison to soft water. When hard water and soap are mixed together the salts of the minerals like Ca2+ and Mg2+ ions present in hard water react with fatty acids of the soap.

The sodium salts are changed to the salts of calcium and magnesium which are precipitated to an insoluble substance. The insoluble salts of the calcium or magnesium dirt stick on the clothes thus cleaning ability of soap is reduced.

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The unequal sharing of electrons between the oxygen and hydrogen atoms within a water molecule makes water a ____________ molecu
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the positive charges of the nuclei and the negative charges of delocalized electrons

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This bond type is the metallic bond.

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