Answer
0.1 kg, 0.05 kg, 0.05, 5%
Work Step by Step
For the given measurement, we have
The precision is 0.1 kg
The greatest possible error is one-half the precision
$0.5\cdot 0.1 \ kg= 0.05 \ kg$
The relative error is
$relative~error=\dfrac{greatest~possible~error}{measurement}$
$\frac{0.05\ kg}{1.0\ kg}=0.05$
The percent of error is $5\%$
