Worksheets6.1-8 | Unit 6 Review
Total questions: 21
Worksheet time: 53mins
Which of the following statements regarding the mole is INCORRECT?
A mole is a unit of quantity equal to 6.022 x 1023 particles.
The number of particles in a mole is known as Avogadro’s number.
A mole of particles of an element is numerically equal to the atomic mass of the element.
none of the above
The mass of one mole of an element is equal to
its atomic number from the periodic table, but in amu.
its atomic mass from the periodic table, but in amu.
its atomic mass from the periodic table, but in grams.
its atomic number from the periodic table, but in grams.
What is the molar mass of PbSO4?
303.26 g/mol
255.26 g/mol
163.86 g/mol
372.26 g/mol
How many formula units are in 2.5 moles of NaCl?
1.5 x1024 formula units NaCl
1.5 formula units NaCl
4.2 formula units NaCl
4.2 x10-24 molecules NaCl
Shivani measures out 6.0 moles of epsom salt (MgSO4) to put in her bath. How many grams of MgSO4 went in the bath?
3.6 x 1024 g MgSO4
720 g MgSO4
0.050 g MgSO4
340 g MgSO4
How many molecules are there in 31.8 moles of water?
5.28 x 10-23 molecules H2O
1.91 x 1025 molecules H2O
5.28x 10-25 molecules H2O
1.91 x 1022 molecules H2O
Which of the following dimensional analysis setups (in the picture) will correctly convert 27.76 g of Li to atoms of Li?
A
B
C
D
What is the mass of 1.2 x 1024 atoms of C?
2.0 grams C
24 grams C
0.17 grams C
1.4 x 1025 grams C
How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?
1.26 moles Al(OH)3
0.8 moles Al(OH)3
7,670 moles Al(OH)3
1.63 x 10-22 moles Al(OH)3
How many particles are there in 2.45 moles potassium chloride, KCl?
4.08 x 10-24 particles KCl
1.48 x 1024 particles KCl
1.48 particles KCl
4.08 particles KCl
What is the molar mass of table salt (NaCl)? Read all options! Be careful!
58.44 grams
35.45 g/mol
22.99 g/mol
58.44 g/mol
What is the percent by mass of oxygen in MgO?
40.31%
39.69%
50.01%
60.31%
What is the percent by mass of fluorine in CaF2 ?
78.08%
48.67%
51.33%
65.32%
A compound consists of 72.2% magnesium (Mg) and 27.8% nitrogen (N) by mass. What is the empirical formula?
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula of the compound using these mass percents.
SO
SO2
SO3
SO4
A formula with the lowest whole number ratio of elements in a compound is called a(n)...
Molecular Formula
Chemical Formula
Empirical Formula
Molar Mass Formula
What is the molecular formula if the empirical formula is CH2O, and the molecular mass is 120.12 g/mol?
CH2O
C2H4O2
C4H8O4
C6H12O6
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696 g/mol?
A chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound is called a(n)...
