Definitions
An atom, molecule, ion, or formula unit
What is a particle?
The length of 1 mole of metersticks
What is 6.022 x 1023 meters?
The number of particles in one-quarter of a mole
What is 1.506 x 1023 objects?
The mass of 1 mole of carbon
What is 12.01 grams?
The number of moles of hydrogen gas that would react with 2.5 moles of oxygen gas
2 H2 + O2 ---> 2 H2O
What is 5.0 moles of oxygen gas?
The number 6.022 x 1023
What is Avogadro's Number?
The units of molar mass
What is grams per mole (g/mol)?
The number of molecules in 91.2 moles of water
What is 5.492 x 1025 molecules of water?
The molar mass of Na2CO3
What is 105.99 grams per mole?
The number of moles of water that will react with 2.68 moles of iron
2 Fe + 3 H2O ----> Fe2O3 + 3 H2
What is 4.02 moles of iron?
The mass of 1 mole of copper, in grams
What is molar mass of copper?
Between 10.0 grams of iron and 10.0 grams of silver, the sample with the smaller number of moles
What is 10.0 grams of silver?
The number of moles in 7.407 x 1024 particles of helium?
What is 12.3 moles of helium?
The number of moles of lead (Pb, 82) in a 2750-gram pure lead pipe
What is 13.27 moles of lead?
The number of moles of KOH that will react with 14.21 grams of HBr
HBr + KOH ----> KBr + H2O
What is 0.1756 moles of KOH?
6.022 x 1023 grains of rice
What is 1 mole of rice?
The units that Avogadro's Number helps us convert between
What are particles and moles?
The number of moles of nickel (II) sulfate in 4.298 x 1017 formula units
What is 7.137 x 10-7 moles of nickel (II) sulfate?
The number of moles of magnesium nitrate, Mg(NO3)2, that would weigh 6.41 grams
What is 0.0432 moles of magnesium nitrate?
The number of grams of CO2 that will be produced by the combustion of 0.00527 moles of kerosene (C13H28)
C13H28 + 20 O2 ----> 13 CO2 + 14 H2O
What is 3.02 grams of CO2?
A fraction using two of the coefficients in a balanced chemical equation
What is molar ratio?
A leading zero, or a trailing zero in a number with no decimal places
What is a non-significant digit?
The number of atoms (of any kind) in 0.06208 moles of Ca(OH)2
What is 1.869 x 1022 atoms?
The mass of 0.179 moles of ammonium sulfate, (NH4)2SO4
What is 23.7 grams of ammonium sulfate?
The number of moles of AlCl3 required to form 0.00124 moles of BaCl2
_ Ba(OH)2 + _ AlCl3 ----> _ Al(OH)3 + _ BaCl2
What is 8.26 x 10-4 (or 0.000826) moles of AlCl3?