Question

I need some help on these problems:
1) A swimming pool measures 9.0 m long by 3.5 m wide by 1.75 m deep. What mass of water in metric tons (1 metric ton = 1000 kg) does the pool contain when filled? The density of the water is 0.991 g/cm3.

2) If a liquid has a density of 1.17 g/cm3, how many liters of the liquid have a mass of 3.75 kg?

3) When a sample of a metal alloy that has the mass of 9.65 g is placed into a graduated cylinder containing water, the volume reading in the cylinder increases from 16.0mL to 19.5mL. What is the density of the alloy sample in grams per cubic meter?

Answer 1

number 2 should be M=3.75/1.17=3.2 Liters, so the volume of the liquid is 3.2 Liters.

Answer 2

3. the amount of water displaced is = to the volume of the object so you have 3.5 ml displaced. therefore, the volume of the object is 3.5 ml or 3.5 cm^3
density is mass / volume
9.65g / 3.5cm^3 = 2.8 g/cm^3

Answer 3

Yayy! That means I number 2 right! Thanks! :)

Answer 4

no problem:)

Answer 5

I looked at number one and I'm like what the hell is this? :/

Answer 6

i don't even know! teachers are killing us i swear