How are 0.50 mol Na2CO3 and 0·50 M Na2CO3 different?
Molar mass of Na2CO3 = 2 x 23 + 12 + 3 x 16 = 106 g
0.50 mol Na2CO3 means 0.50 x 106g = 53g
0.50M Na2CO3 means 0.50 mol i.e. 0.50 x 106g, i.e. 53 g of Na2CO3 are present in 1 litre of the solution.
Express 0.0468 in scientific notation.
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(i) Density
(ii) Molarity
(iii) Energy
(iv) Temperature ?
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