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# Stoichiometrics-2

### Digging Into It

4 Steps to solving Stoichiometric problems are: 1. Balance equation. 2. Convert units to moles. 3. Using moles ratio, calculate the moles of substance that is yielded. 4. Convert to desired units
The constituent parts of a chemical equation are: Never destroyed or lost
The yield of a reaction must: Exactly correspond to the original reagents
To balance a chemical equation we must: place coefficients before the various molecules & atoms to insure they balance on both sides of the equation
The process of balancing an equation is essentially trial and error
The gram formula mass of a compound (or element) is the mass of one mole of the compound
Grams/mole, or the gram formula mass can be found by adding the atomic weights of every atom in the compound
A mole of a 12 amu (atomic mass unit) carbon atom will weight now many grams? 12 grams
Why is the Ideal Gas law useful? It provides a handy means of converting between moles and a gas provided you know certain qualities of the gas
What is a formula unit? The smallest unit of a substance that still retains that substance's properties and is the simplest way to write the formula of the substance without coefficients
(MolaRity) The equation to solve for moles yields would look like what? Moles=molarity x liters of solution
(MolaLity) The equation to solve for moles yields would look like what? Moles=molality x kilograms of solution
The mole ratio describes exactly what the name suggests and that is the molar ratio at which a reaction will proceed
Created by: SG Luther