# maths

A piece of metal has a volume of 20 cm^3 and a mass of 300g.Calculate the density of the metal in kg/m^3.i got 15.plz confirm my answer.And how does one go about this.2.5 litres of water density 1g/cm^3 is added to 8 litres of alcohol density 0.8 g/cm^3.Calculate the density of the mixtures

1. 👍 1
2. 👎 0
3. 👁 272
1. well, since density = mass/volume, that gives
300g/20cm^3 = 15 g/cm^3
so you are correct.

for the alcohol mixture, just figure total mass / total volume
2.5L of water = 2500cm^3, so its mass is 2500*1 = 2500g
8L of alcohol = 8000cm^3, so its mass is 8000*0.8 = 6400g
So, the density of the mixture is
(2500+6400)g / (2.5+8)L = 8900g/10.5L = 847.6 g/L = 0.8476 g/cm^3

1. 👍 1
2. 👎 0

## Similar Questions

1. ### Physics

An object with total mass mtotal = 15.8 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.5 kg moves up and to the left at an angle of θ1 = 18° above the –x axis with a speed of v1 = 27.6

2. ### College Algebra

A rectanguler piece of metal is 5 inches longer than it is wide. Square with sides 1 inches longer are cut from the four corners and the flaps are folded upward to form an open box. If the volume of the box is 644 inches, what are

3. ### College Algebra

A rectangular piece of metal is 15in longer than it is wide. Squares with sides 3 in long are cut from four corners and the flaps are folded up to form an open box. If the volume is 1218in^3, what we’re the original deminsions

4. ### chemistry

A 6.50 g piece of substance B was rolled out into a thin sheet measuring 24.0 cm x 18.0 cm. a.) Calculate the volume of the sheet of metal. Show work; use labels. [I also had to look at a graph, here is some information about

1. ### Algebra

Write a formula showing the dependence of the mass of a piece of cork on its volume, if the density of cork is 0.18g/cm3. Using the formula, find the mass of a piece of cork with a volume of 240 cm3 If the mass of a piece of cork

2. ### Fluid Mechanics

A 6 kg. piece of metal displaces 1 liter of water when submerged. What is its density? The volume of the water dispaced was given, so... Density metal= massmetal/volumemetal The volume of water displaced is the same as the volume

3. ### physics

A piece of metal has a mass of 85cg and a volume of 450L. What is its density in g/cm3? What would be the mass of 300 cm3 of this metal? What would be the volume of 00 ounces of this metal?

4. ### chemistry

a cubic piece of metal measures 5.00 cm on each edge. if the metal is nickel, whose density is 8.90g/cm cubed, what is the mass of the cube?

1. ### Chemistry

mass of empty flask with stopper = 32.634 g mass of flask with water and stopper = 59.479 g density of the water = 0.9973 g/cm^3 mass of water = 26.845 g volume of water = 26.918 cm^3 the flask is then emptied and an unknown

2. ### MAT 150

A rectangular piece of metal is 15 inches longer than it is white squares with size 3 inches longer cut from the four corners and the flaps are for the upward to form an open box if the volume of the box is 750 inches^3 What were

3. ### Physics, Desperate Need of help!

Gold, has a mass of 19.32g for wach cubic centimeter of volume, is most ductile metal and can be pressed into a thin leaf or drawn out into long fiber. -If a sample of gold, with a mass of 27.63g is pressed into a leaf of

4. ### physics

a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree