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(a) How many significant figures are the...

(a) How many significant figures are there in `1.00 xx 10^(4)`?
(b) One mole of sugar contains…….. Oxygen atoms.
( c) Give an example of moleules in which the empirical formula is `CH_(2)O` and the ratio of molecular formula weight and empirical formula weight is 6.

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(a) 3
(b) One mole of sugar `C_(12)H_(22)O_(11)` contains `11 xx 6.023 xx 10^(23)` oxygen atoms.
( c) `C_(6)H_(12)O_(6)`.
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