An analytic balance has uncertainty In measurement equal to $\pm$ 1 mg. Then report the result in terms of percentage if the weight of a compound is
(a) 1 g
(b) 10 g
(c) 100 g

;

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Solution

The correct option is A
;

(a) $1 \pm 0.1 %$ (b) $10 \pm 0.01 %$ (c) $100 \pm 0.001 %$
The uncertainty in measurement is expressed in terms of percentage by putting $\pm$ sign before it, e.g., $150 \pm 1 %$ , et. Smaller the quantity to be measured, greater is the percentage uncertainty, and the instrument should be more precise for the measurement of smaller quantities.

$1 m g = \frac{1}{1000} g \frac{1}{1000} \times 100 = \frac{1}{10} = 0.1 1 \pm 0.1 %$

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An analytic balance has uncertainty In measurement equal to ±1 mg. Then report the result in terms of percentage if the weight of a compound is (a) 1 g (b) 10 g (c) 100 g

An analytic balance has uncertainty In measurement equal to $\pm$ 1 mg. Then report the result in terms of percentage if the weight of a compound is
(a) 1 g
(b) 10 g
(c) 100 g