Question

10.070 g----4 sig figs

Answer 1

hm not quite, trailing zeros after a decimal point are significant

so all the digits in this case are significant

Answer 2

so 5

Answer 3

but i thought in a number like 25.00 only 2 and 5 are sig

Answer 4

this is a confusing rule but in 25.00 both the zeros are trailing zeros after the decimal point so both 0's are significant

for a # like 2500 then only the 2 and 5 would be significant b/c zeros are before the decimal point

the exception is if you include a decimal point like 2500. then the 0's become significant