What is the mass of a sample of material that has a volume of 6260 and a density of 6980 g/cm

A hydrocarbon contains 20 % by mass of hydrogen. What is its empirical formula?

How to convert 2750 mg to g?

What mass of Al2O3 (alumina, a finely divided white powder that is produced as billows of white smoke) is formed in the reaction of 2800 kg of aluminum?

A 3.31-g sample of lead nitrate, pb (no3) 2, molar mass = 331 g/mol, is heated in an evacuated cylinder with a volume of 2.11 l. the salt decomposes when heated, according to the equation:

Isozymes catalyze the same reactions, and have different Kn and Vmax (T/F)

An egg is fried is that a physical or a chemical change

How many mono-; di -; and trichloro derivatives are possible for cyclopentane?

A gas occupies 3.60 L when the temperature is 45.0oC and at 1.02 atm of pressure. What temperature change (in K) will be needed to change the volume to 6.25 L at constant pressure?

When did Pangaea begin to break apart? a. 20 million years ago c. 250 million years ago b. 100 million years ago d. 2 billion years ago.

When an object is thrown, the thrower pushes the object. This causes the object to move in a motion.