A penny has a total mass of 3.1 grams. Zinc makes up 2.9 g of the penny. What is the percentage of zinc in the penny?

A compound contains carbon, hydrogen, and chlorine. It has a molar mass of 98.95 g/mol. Analysis of a sample shows that it contains 24.27% carbon and 4.07% hydrogen. What is its molecular formula?

If you are measuring something with a graduated cylinder, what are you measuring?

What are the similarities of physical and chemical change?

Determine the volume in liters occupied by 22.6 g of I2 gas at STP. A. 1.99 L B. 128483.71 L C. 3.98 * 10^-3 D. 7.78 * 10^-6 (NOT B OR D)

If a bottle of olive oil contains 1.4 kg of olive oil, what is the volume, in milliliters (mL), of the olive oil?

What mass of Na2CrO4 is required to precipitate all of the silver ions from 73.6 mL of a 0.150 M solution of AgNO3?

What effect do you think gravity has on a planet's orbit? Describe what happens when yon tetove gravity?

The minimum amount of energy that reactants must have to start a chemical reaction is called

When 28 grams of a metal are heated from 14.4°C to 150°C it takes 23,200). What is the specific heat of the metal?

For the reaction 6 Li + N2 → 2 Li3N, what is the maximum amount of Li3N (34.8297 g/mol) which could be formed from 14.18 mol (6.941 g/mol) of Li and 16.37 mol of N2 (28.0134 g/mol) ? Answer in units of mol.