Which variable can affect your grade on a spelling test?

A) how much you studied

B) what you are wearing

C) the weather

D) the day of the test

Upon combustion, a 0.8009 g sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6004 g CO2 and 0.6551 g H2O. Find the empirical formula of the compound.

An apple pie needs 10 large apples 2 crusts (top and bottom) and 1 tablespoon of cinnamon. Write a balanced equation that fits this situation. How many apples are needed to make 25 pies?

Calculate the kinetic energy of co2 at 254 k.

Polyatomic ion that is the conjugate acid of ammonia

Which rock composed of a mineral that can be used for the production of cement?

Calculate the volume of a 0.323-mol sample of a gas at 265 K and 0.900 atm.

What is the molar mass of the following substance : Cs2CO3

What does the velocity of a wave describe

Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?

Which one of the following statements about orbital energies is incorrect? A) The energy of a given orbital increases as the nuclear charge Z increases. B) In many-electron atoms the energy of an orbital depends on both n and l.