Hi, here's my problem: The balance of a bottle when empty is 70.0g, when full of water is 90.0g and when full of another liquid is 94.0g. The density of water is 1000km/m(to the power of 3), what is the density of the toher liquid? I know that density = mass / volume so i think that i should take 70.0 away from 90.0 to get the mass of the water alone, so I get 20.0g. From here I'm stuck. Thanks for any help!