click below
click below
Normal Size Small Size show me how
Stoichiometrics-2
Digging Into It
Question | Answer |
---|---|
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 |