Question

an analytical balance has uncertainty in measurement equal to plus or minus 1 milligrams then the results in terms of percentage would be if the weight of compound is 10 grams

Answer 1

error=+-1mg=+-10^-3g
%error={10^-3/10}×100=10^-2=0.01%

result=10 +0.01%

Answer 2

We know that, 1 Gram = 1000 Milligram.

It is given that, the weight of the compound = 10 g = 10000 mg

Uncertainty in measurement of the analytical balance = plus or minus 1.

Therefore, Result = 10000  mg

Percentage of 1 mg in 10000 mg  = 1/10000 * 100=  0.01 %

In terms of percentage, Result will be 10000 mg ± 0.01 %