How many molecules are present in-
(i) 20 grams of water
(ii) 1.7 grams of ammonia
(iii) 3.65 grams of hydrochloric acid
(iv) 11 grams of potassium bromide
(v) 11 grams of calcium carbonate
(vi) 12.2 grams of aluminium phosphate
(vii) 170 grams of ammonium
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Explanation:
If you want to cal. molecules then apply this formula
no. of molecules=Mass × Avogadro no. ÷molecular mass of substance
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