Moles, limiting reagents, empirical formulas, quantum numbers, electron configurations and periodic trends.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a mole?
Show answer
A unit of amount of substance equal to 6.022 × 10^23 particles (atoms, molecules, ions, etc.)- What is the value of Avogadro's number?
Show answer
6.022 × 10^23 particles per mole- Define molar mass.
Show answer
The mass in grams of one mole of a substance; numerically equal to the atomic or molecular weight- How do you convert from moles to grams?
Show answer
Multiply moles by molar mass: grams = moles × molar mass (g/mol)- How do you convert from grams to moles?
Show answer
Divide grams by molar mass: moles = grams / molar mass (g/mol)- How do you convert from moles to number of particles?
Show answer
Multiply moles by Avogadro's number: particles = moles × 6.022 × 10^23- How do you convert from number of particles to moles?
Show answer
Divide number of particles by Avogadro's number: moles = particles / 6.022 × 10^23- What is the molar volume of an ideal gas at STP?
Show answer
22.4 L/mol at standard temperature and pressure (0°C and 1 atm)- Define molarity.
Show answer
The concentration of a solution expressed as moles of solute per liter of solution- What equation relates molarity and volume before and after dilution?
Show answer
M1V1 = M2V2, where subscript 1 is the initial state and subscript 2 is the final state- What is a limiting reagent?
Show answer
The reactant that is completely consumed in a chemical reaction; determines how much product can form- How do you identify the limiting reagent in a reaction?
Show answer
Calculate moles of product that each reactant can produce, then identify which reactant produces the least product- What is an excess reagent?
Show answer
A reactant that has moles remaining after the reaction is complete because the limiting reagent was entirely consumed- Define theoretical yield.
Show answer
The maximum amount of product that can be produced from a given amount of reactant, based on stoichiometry- What is percent yield and how is it calculated?
Show answer
The ratio of actual yield to theoretical yield expressed as a percentage: percent yield = (actual / theoretical) × 100%
FlashKeepers