5 of them.
Five.
2 significant figures.
Three.
there are 5 significant figures
6 of them.
Two significant figures the measurment 0.0255 g should be reported as 0.026g
There are 2 significant figures in this measurement.
2 significant figures.
2 significant figures.
2 of them.
5
6 of them.
Three.
There are two significant figures.
4 of them.
there are 5 significant figures
2 of them.
Three - all nonzero digits are significant.