How many significant figures in 0.5?

Answer 1

Three: 502. Leading and trailing zeroes are not significant (but the zero between two nonzero numbers is).

Answer 2

Just 1. The zeros before the 5 are just placeholders, not significant figures. However, if the number were 0.0500, then there would be 3 sig figs. This is because the extra zeros represent greater accuracy in the measurement.

Answer 3

There are 3 significant figures: 5, 0 and 2. this means that if you were going to simplify the decimal, it would be 0.0502. you can't lose the first 2 zeros because they are important placeholders.

Answer 4

Yes, 0.50 has two significant figures

Answer 5

Two

Answer 6

1 of them.

Answer 7

Just one