Question | Answer |
(Standard Temperature and Pressure) The conditions under which the volume of a gas is usually measured; standard temperature is 0 degrees celsius, and standard pressure is 101.3 kPa. | STP |
The volum occupied by 1 mole of a gas at standard temperature and pressure (STP). | Molar Volume |
The smallest unit into which as substance can be broken down without a change in composition, usually atoms, molecules, or ions. | Representative Particle |
A term used to refer to the mass of a mole of any substance. | Molar Mass |
The weighted average of the masses of the isotopes of an element. | Atomic Mass |
The number of representative particles contained in one mole of a substance; equal to 6.02 X 10 23 particles | Avogadro's Number |
A formula with the lowest whole number ratio of elements in a compound. H2O2 is HO. | Empirical Formula |
The percent by mass of each element in a compound. | Percent Composition |
Three methods for measuring the amount of a substance are by ________, by ________, and by ________. | Count, Mass, Volume |
A mole of any substance always contains ___________ representative particles. | 6.02 X 10 23 |
The atomic mass of an element expressed in grams is the mass of a _____ of the element. | Mole |
An __________ ___________ of a compound is the simplist whole number ratio of atoms of the elements in the compound. | Empirical Formula |
The _________ _________ is either the same as its experimentally determined empirical formula, or it is a simple whole number multiple of it. | Molecular Formula |
Representative Particles ----> Moles | Divide number of representative particles by 6.02 X 10 23. |
Number of Moles ----> Mass (Grams) | Multiply number of moles by molar mass. |
Moles ----> Representative Particles | Multiply number of moles by 6.02 X 10 23. |
Mass (Grams) ----> Moles | Divide mass (grams) by molar mass. |
Grams/L ----> Grams/Mole | Multiply value of Grams/L by 22.4 L. |
Moles of Gas ----> Volume of Gas | Multiply moles of gas by 22.4 L |
Percent Mass of Element | Mass of element divided by mass of compound, times 100%. |