WorksheetsMole Corrections
Total questions: 19
Worksheet time: 10mins
what are the units for molar mass?
grams
grams per mole
particles per mole
mole
How would you find the molar mass for K2S?
Add 1 mole of sulfur to 2 moles of potassium
Add 2 moles of potassium to 1 mole of sulfur
Add 1 mole of sulfur to 1 mole of potassium
Add 2 mole of sulfur to 2 moles of potassium
What is the empirical formula for C4H6
CH
C2H3
CH3
C4H
The mass of one _____is the molar mass of the element
mole
gram
particle
milliliter
What conversion factor should be used if f.u. and moles are in your problem
molar mass
avogadros number
5 moles of Na is ______ molecules, what conversion factor
molar mass
avogadro's number
avogadro's number and molar mass
How many atoms are in 20g of Ba. Conversion factor?
molar mass
avogadro's number
molar mass and avogadro's number
Which is not a set of units for avogagdro's number
g/mol
atoms/mol
molecules/mol
formula units/mol
Which is always the true formula for a compound?
molecular
empirical
If you are asked for the molecular mass, you need to use the...
empirical formula
molecular formula
particles
How many sigfigs: 4.00570
6
3
4
1
Round to 1 sigfig: 3903.0
4000
4
3
4000.0
Round to 2 sigfigs: 40,000
4.0x104
4.0x10-4
40.000
40
How many grams are in 6.89 mol of H2O?
124g
124.12g
0.382g
234g
How many grams are present in a sample of CaBr that contains 1.22x1024 f.u.
243g
2.03g
1.44x1027 g
2.03x1045g
How many atoms are in a sample of 4.000 mol of Mg?
97.22 atoms
0.1646 atoms
2.408x1024 atoms
6.645x1022
How many atoms are in 15 moles of boron?
9.03x1024atoms
162.18 atoms
9.0x1024 atoms
160 atoms
How many moles are in 405g of oxygen?
12.7mol
25.3mol
6480mol
13 mol
What is the percent composition of Li in Li2S?
30.2%
.302%
69.8%
15.1%
