GuacaMOLE
What is the most common unit used to measure the amount of atoms in a given substance?
Moles
How many sulfur atoms are present in 3.2 mol of sulfur?
1.93 x 1024 sulfur atoms
What is the molar mass of CH4?
16.05 g/mol CH4
What is the molar mass of antimony? (Round to the nearest whole number)
122 g/mol
Find the mass of 1.26 x 10-4 mol of HC2H3O2.
0.000757 g HC2H3O2
What is Avogadro's number and what is it equal to?
Avogadro's number is:
6.02 x 1023
And it is equal to 1 mol
Convert 1.62 x 1020 molecules of CH4 to moles
0.00027 mol CH4
How many moles are present in a 4.3 g sample of CH4?
0.27 mol CH4
What is the molar mass of sodium chloride? (Round to the nearest whole number)
58 g/mol
What is the volume of 1.2 mol of water vapor at STP?
27 L H2O
How many water molecules are present in 1 mol of water?
6.02 x 1023 water molecules
If a sample contains 6.02 x 1024 formula units of NaCl, how many moles are present in the sample?
10 mol of NaCl
How many moles are in 265 grams of MgCO3?
3.14 mol MgCO3
What is the molar mass of zinc phosphate? (Round to the nearest whole number)
385 g/mol
Find the mass of 2.6 mol of lithium bromide.
230 g LiBr
What is the mass of 1 mol of water?
18.02 g of water
What is the mass of 6.02 x 1023 gold atoms?
196.97 g Au
What is the mass of 0.9 mol sample of MgCO3?
75.8 g MgCO3
What is the molar mass of ammonium chloride? (Round to the nearest whole number)
96 g/mol
How many atoms of nitrogen are in 0.400 moles of N2O5?
4.82 x 1023 atoms nitrogen
What is the correct molar mass of iron (III) sulfite?
351.87 g/mol Fe2(SO4)3
How many formula units are in 26.4 g of KNO3?
1.57 x 1023 formula units KNO3
What is the mass of 5.61 x 1023 formula units MgCO3?
78.57 g MgCO3
What is the molar mass of lead (IV) nitrate? (Round to the nearest whole number)
467 g/mol
Determine the volume (in mL) occupied by 0.030 moles of a gas at STP.
670 mL
What is the volume of one mole at STP?
22.4 L
What is the volume of 9.03 x 1022 oxygen molecules at STP?
3.36 L
Determine the volume (in L) occupied by 14 g of nitrogen gas at STP.
11 L of Nitrogen
Find the mass of 5 moles of hydrogen gas.
10 g
How many oxygen molecules are in 3.36 L of oxygen gas at STP?
9.03 x 1022 molecules O2