Moon chemistry? Please help homework lol!!?

[*(-.-)*]

sorry for bad spelling, i really need this done, i love u if u help!

1. which procedure is best to use when determing the density of rock

a. place rock in a water filled beaker and find the height at which the rock floats above water.

b. use ruler to measure rocks dimensions and then find its mass using an analytical balance

c. measure the mass of the rock on a balnce and then find the volume of water it displaces in a graduated cylynder

d. place the rock in three liquids with differenet known densites and obesrve which liquid the rock floats in.

2. what is the densitity at 20 C of 12.0 milliliters of a liquid that has a mass of 4.05 grams?

a.0.338 g/mL
b. 2.96 g/mL
c 16.1g ml
d 48.6 g/ml

3. a block of maple wood with voule of 405 cubic centemiters and denestity of 0.67 g/cm(3) is sawed in half. The density is of the two smaller block nows-

a one fourht of the original density
b one half of the original density
c two times the original density
d the same as the original densi

[icie]

1. c
2. a
3. d