PDF chapter test TRY NOW
Fill in the blanks with a suitable answer.
(a). In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called __________.
(b). A group of atoms carrying a fixed charge on them is called __________ .
(c). The formula unit mass of Ca_3(PO_4)_2 is __________.
(d). Name of Na_2CO_3 is __________ and that of (NH_4)_2SO_4 is __________.
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