Vocabulary
The amount of entities in a mol is called _______ 's constant or _______'s number.
Avagadro (Avacado Guy is not an acceptable answer)
Calculate the molar mass of NaI.
149.89 g/mol
How many moles are in 80.465 g of Na?
3.5 moles
How many atoms are in 3 mols of Na?
1.8066 x 1024 atoms Na
What is the mass of 3.792x1027 molecules of H2SO4?
607400 g
The _______ _______ is the mass of 1 mol of a specific element.
Molar Mass
Calculate the Molar Mass of CH4
16.043 g/mol
How many mols are in 50 grams of H2O?
~ 2.775 moles
There are 1.601x1024 Calcium Chloride atoms, how many mol are there?
2.66 mol CaCl2
How many molecules are in 5.02g of NH4OH?
8.62x1022
Units cancel out of stoichiometry equations when the same unit is each on the _______________ and __________________________
numerator and denominator
291.717 g/mol
If you have 7.5 mol of NaCl, how much will this weigh in grams?
438.3 g NaCl
How many molecules are in 45 mol of CaCO3
2.710x1025 molecules CaCO3
How many atoms are in 7.11g of CH4?
2.67x1023
A standard unit in chemistry is used for measuring large amounts of small entities such as atoms or molecules.
Moles (Mol is acceptable)
Calculate the Molar Mass of CaCO3
100.086 g/mol
How many mols are in 63 grams of Ca(CO)2
~ 0.629 mol
How many molecules are in 18.015 g of H2O
6.022x1024 molecules H2O
How many grams are in 19.17x1023 atoms of PH3?
108.23 g
______ in chemical equations tell us the number of moles of a compound that are required for this reaction to take place.
Coefficients
What is the molar mass of C12H22O11
342.297 g/mol
If you have 11.5 mol C4H11, how many grams will this weigh?
680.018 g C4H11
How many molecules are in 48 grams of CH4
1.8021x1024 molecules
How many atoms are in 63.07g of water?
2.108x1024