Question

Could someone help me out?


A hot air balloon holds 3,249 cubic meters of helium. The density of helium is 0.1785 kilograms per cubic meter. How many kilograms of helium does the balloon contain, rounded to the nearest tenth of a kilogram?
1,873.4 kg
2,194.6 kg
2,721.2 kg
579.9 kg

Answer 1

Use the formula of density here :
\[p=\frac{ mass }{ volume}\]
where ρ ( pronounced as rho) is the density of the substance (here substance is Helium)

Given to you that density of helium in the balloon:
\[PHe=0.1785kgm^-3\]
And given that volume of Helium gas in the balloon = 4,328 m^3

Answer 2

So, it is actually volume of helium gas and the density

Since, density = mass/ volume

So, mass = density * volume...

Answer 3

So 0.1785x3249?

Answer 4

Mass = Volume * Density = 4328 * 0.1785

Answer 5

oh ok

Answer 6

77.25

Answer 7

772.5 sorry @Qwertty123 put the decimal point to early lol

Answer 8

lol Nice job! Yes that is right.

Answer 9

wait that is none of my options @Qwertty123

Answer 10

not one of*

Answer 11

Oh my.. I put the wrong numbers in.. :/

Answer 12

You where right about the numbers my bad...So do your numbers to get the right answer..

Answer 13

Alright thank you

Answer 14

Yep it is D. 579.9 Thank you so much!

Answer 15

You welcome :)