Chemistry help : how do you convert.. please show me how to do it :D

Question

the - is the negative (a) 9.5x10-2 kg to g, (b) 0.0023 um to nm, (c) 7.25x10-4 s to ms

Answer 1

a)1 kilogram = 1 000 grams

b)um to nm multiply by 1000

c)1 second = 1 000 milliseconds

Answer 2

Use conversion factors:

1 kg = 1000 g

1 m = 10^ -6 um = 10^ -12 nm

1 sec = 1000 msec

Using the rule that n/n = 1 no matter what "n" is, you can use these conversion factors to change the units without actually changing the values:

(a) 9.5x10^ -2 kg * (1000 g / 1 kg) = 95 g

(b) 0.0023 um * (10^ -12 nm / 10^ -6 um) = 2.3x10^ -9 nm

(c) 7.25x10^ -4 s * (1000 ms / 1 sec) = 0.725 ms

Might want to check the math, but I think these are right!