The idea is to divide the mass by the volume.
Density = Mass/Volume = 600/30 = 20 grams per ml.
Milliliters is volume and grams is mass, so you need to know mass density to solve this. For water, it has mass density of 1 gram per cubic centimeter which is the same as 1 gram per millitre of volume. So for water only, 20 ml = 20 grams.
The volume of the little cube is 23 = 8 cubic inches so the density of the material is 8/20 = 0.4 grams per cubic inch.The volume of the large cube is 83 = 512 cubic inches, so the mass (not the weight) is 512*0.4 = 128 grams.
20% of 2000 grams= 20% * 2000= 0.2 * 2000= 400 grams
Divide mass by density to get volume....So 300/0.88 --> 340.91 mL
The mass of 40 grams is 40 grams and the volume of 20mL is, wait for it, ... 20 mL!
If the two occupy the same volume, 25 grams is denser.
Density = Mass / Volume So, density of an object with a volume of 10ml and a mass of 20 grams is = m / v = 20grams/10ml = 2g/ml
It is: 20/5 = 4 grams per cm3
Benzene has a chemical formula of C6H6 This has a molar mass of 78. So one mole has a mass of 78 grams
to calculate the weight from the volume, you always multiply by the density. example: If the benzene content is 2.5%v/v, then in 100mL of gasoline, you have 2.5mL of benzene. If the density of Benzene at 15.5°C is 0.81g/mL, then 2.5 x 0.81 = 2.0%w/v.
As density is measured in mass per unit volume, the question is unanswerable as written. We need to know "density of 2.5 grams per what measure of volume" in order to answer the problem.
Density = (mass) / (volume) = 20/4 = 5 grams per cc
Regulations in the US and Europe limit the benzene content in gasoline to 1% by volume.
100 millilitres.
The idea is to divide the mass by the volume.