Question

The density of hydrogen is approximately 9 times 10^-5 , while the density of helium is approximately 2 times 10^-4 . Which of the following is true?
The density of hydrogen is approximately 2 times the density of helium.

The density of helium is approximately 20 times the density of hydrogen.

The density of helium is approximately 2 times the density of hydrogen.

The density of hydrogen is approximately 20 times the density of helium.
@jigglypuff314

Answer 1

sorry, wrong one! @

Answer 2

@ jigglypuff314

Answer 3

9 times 10^-5 = 0.00009
2 times 10^-4 = 0.0002

Answer 4

0.0002 > 0.00009
so helium is bigger than hydrogen
then 0.0002/0.00009 = (approximate ratio)

Answer 5

ok!