Thread: Chemistry conversions help

I have no idea how to do these problems:

1.The price of a ream of paper is $3.30. There are 500 sheets of paper in a ream. If a sheet of paper weighs 0.500 oz, what is the price of a kg of paper? What is the cost of one sheet of paper? What is the mass (grams) of on sheet of paper?


2. Peanut oil has a density of 0.92 g/cm3. If a recipe calls for 1 cup of peanut oil (1 cup = 225 ml), what mass of peanut oil (in grams) are you using?


3. A new United States quarter has a mass of 5.63 g. What is the mass of a row of quarters laid end to end for 1 meter?


4. At 25 ºC the density of water is 0.997 g/cm3, whereas the density of ice at -10 ºC is 0.917 g/cm3. If a soft drink can whose volume is 250.0 ml is fill completely with pure water, sealed, and then frozen at -10ºC, what volume does the solid occupy? What would you expect to happen to the can?

1.The price of a ream of paper is $3.30. There are 500 sheets of paper in a ream. If a sheet of paper weighs 0.500 oz, what is the price of a kg of paper? What is the cost of one sheet of paper? What is the mass (grams) of on sheet of paper?

1. Work out how many oz are in 1kg (use google) and multiply by 500 and 3.30. Ignore the 500 for one sheet

2. Peanut oil has a density of 0.92 g/cm3. If a recipe calls for 1 cup of peanut oil (1 cup = 225 ml), what mass of peanut oil (in grams) are you using?

2. mass = density x volume

3. A new United States quarter has a mass of 5.63 g. What is the mass of a row of quarters laid end to end for 1 meter?

No idea, what's the radius/diameter of a quarter? Not all of us are from the USA

4. At 25 ºC the density of water is 0.997 g/cm3, whereas the density of ice at -10 ºC is 0.917 g/cm3. If a soft drink can whose volume is 250.0 ml is fill completely with pure water, sealed, and then frozen at -10ºC, what volume does the solid occupy? What would you expect to happen to the can?

Ice is less dense than water so the same mass would take up more space....