Common salt obtained from sea-water contains 95% NaCl by mas... — Chemistry | Mockzy

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Common salt obtained from sea-water contains 95% NaCl by mass. The approximate number of molecules present in 10 g salt is;

10²¹

10²²

10²³

10²⁴

The percentage of nitrogen in urea (NH2CONH2), is;

80 g of oxygen gas contains as many atoms as in;

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