HELP!! Chemistry
posted by _Unknown
1. Calculate the density of a material that has a mass of 52.497 g and a volume of 18.5 cm3.
2. A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock is 29.7 cm3, and the mass in 139.943 g. What is the density of the rock?
3. If 130.943 g of a liquid occupy a space of 135.0 ml, what is the density of the liquid in g/cm3?

Anonymous
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(: from Las Vegas
1. d= 52.497 g / 18.5 cm^3 = 2.84 g/cm^3
2. d= 139.943 g / 29.7 cm^3 = 4.71 g/cm^3
3. d= 130.943 g/ 135.0 mL = 0.969 mL or .970 mL 
Mass
mass=20g
Volume=40ml
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