Definitions
Tricky Stuff
Just for Fun
Do You Know?
Chem Challenges
100

This means you have too much of something.

What is "excess"?

100

This is the symbol for iron.

What is Fe?

100

A dark colored circle on your skin.

What is a mole?

100

The amount of product that is actually formed when the reaction is carried out in the laboratory.

What is actual yield?

100

It is important to pass Chemistry for this reason.

What is to earn credit for graduation?

200

Used in chemical equations to show the relative amounts of each substance present. It can represent either the relative number of molecules, or the relative number of moles.

What are coefficients?

200

Iron metal and oxygen gas combine to form this.

What is iron(III) oxide?

200

A small dark animal that is blind and lives underground.

What is a mole?

200

The actual yield compared to the theoretical yield, expressed as a percentage. It is very important in the manufacture of products.

What is percent yield?

200

In this expression of a chemical reaction, the reactants are on the left side and the products are on the right side.

What is a balanced chemical equation?

300

The quantitative relation between the number of moles (and therefore mass) of various products and reactants in a chemical reaction.

What is stoichiometry?

300

This stands for "Standard Temperature and Pressure".

What is STP?

300

A green sauce from Mexican cooking, usually served over enchiladas.

What is mole sauce?

300

In a chemical reaction, the reactant that is consumed first and limits how much product can be formed.

What is a limiting reactant?

300

The maximum amount of product that can be formed from a given amount of reactants.

What is theoretical yield?

400

These are the starting materials and the end-result of a reaction.

What is a product/reactant?

400

mm, mr and mv are the abbreviations for these 3 molar measures.

What is molar mass, molar ratio and molar volume of gas STP?

400

This is a kind of human tooth.

What is a molar?

400

Something that shows how two things are alike, but with the ultimate goal of making a point about this comparison.

What is an analogy?

400

Sodium phosphate + magnesium nitrate

 turns into this when they react.

What is the product of 

sodium nitrate + magnesium phosphate?

500

This relates the amounts in moles of any 2 substances in a chemical reaction.

What is stoichiometric mole ratio?

500

At STP, one mole of any gas will occupy a volume of this.

What is 22.4L?

500

This is an old-fashioned saying that means OMG!!!!

What is Holey-Moley?

500

The mass of a sample of that compound divided by the amount of substance in that sample.

What is molar mass?

500

Use the molar volume of a gas to calculate this.

What is the volume of a sample of gas at STP?