please help me with these six problems just write the number you are answering and answer it 
person who answers most gets choosen as best answer thanks!!
plese show your work
1) A copper penny has a mass of 3.1 g and a volume of 0.35 cm to the 3rd power.Whats the density of copper?
2) A weather ballon is inflated to a volume of 2.2 x 10(to the 3rd power)L with 37.4 g of helium. Whats the density of helium in grames per liter?
3) A plastic ball with a volume of 19.7 cm(to the 3rd power) has a mass of 15.8g. What is its density? Would the ball sink or float in a container od gasoline.
4) A shiny gold colored bar of metal wieghing 57.3 g has the volume of 4.7 cm(to the 3rd power). Is the metal bar pure gold?
the density of gold is 19.3 g/cm(to the 3rd pwer)
5) the mass of a cube of iron is 255g iron has a density of 7.87 g/cm(to the 3rd power) what is the mass of a cube of lead that has the same dimensions
the desity of lead is 11.4g/cm(to the 3rd power)
6) At 20 degrees celcius the density of air is 1.20 g/L nitrogens density is 1.17 g/L oxygens density is 1.33 g/L
A. describe the motion if a balloon filled with oxygen and a ballon filled with nitrogen were released in the air
B. air is made up of mainly oxygen and nitrogen which gas is the main component of air explain your thinking please
mass = density / volume i know i need help on the problems
i need the answers you can say get help on everything in the topic homework help that defeats the purpose of HELP
1) 3.1g / 0.35cm^3 = 8.857 g/cm^3
2) First, 2.2 x 10 x 10 x 10 (or just 2.2 x 1000) then divide 37.4g / 2200 cm^3 and that equals 0.017 g/cm^3
3) 15.8g / 19.7cm^3 = 0.8g/cm^3
4) 57.3g / 4.7cm^3 = 12.19 which would make the answer a no
5) First, 255g / 7.87g/cm^3 = 32.4cm^3 Then, 11.4g/cm^3 x 32.4cm^3 = 369.377g which is your final answer
6) a) The nitrogen is less dense so the balloon would probably float better/faster than the oxygen
b) Air is made up of mostly oxygen. Oxygen is more dense than nitrogen so it probably makes up most of air.
That was fun. I’m not totally sure about my answers for 6 though.
Use the formula:
density = mass/volume
Just plug and chug
References :
D=M/V
References :
d = m/v
References :
the formula is density=mass/volume
I think with this formula you can do your own work.
You just want us to do it for you so you dont have to do any work.
You are in school for a reason. Dont be so lazy.
References :
Ask your teacher for help. Seriously. If somebody does it for you, then you’ll get nowhere, and learn nothing.
References :
DENSITY=MASS / VOLUME
1)72.3 g/cm3
2).017 g/L
I have to do my own homework now and weirdly enough it has to do with density, volume, and mass too.
References :
Density = Mass/Volume
grams = mass
centimeter = volume
Density = grams/centimeter
plug ur numbers in the calculator and you got ur answers!
hope that helped
References :
1) 3.1g / 0.35cm^3 = 8.857 g/cm^3
2) First, 2.2 x 10 x 10 x 10 (or just 2.2 x 1000) then divide 37.4g / 2200 cm^3 and that equals 0.017 g/cm^3
3) 15.8g / 19.7cm^3 = 0.8g/cm^3
4) 57.3g / 4.7cm^3 = 12.19 which would make the answer a no
5) First, 255g / 7.87g/cm^3 = 32.4cm^3 Then, 11.4g/cm^3 x 32.4cm^3 = 369.377g which is your final answer
6) a) The nitrogen is less dense so the balloon would probably float better/faster than the oxygen
b) Air is made up of mostly oxygen. Oxygen is more dense than nitrogen so it probably makes up most of air.
That was fun. I’m not totally sure about my answers for 6 though.
References :