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WorksheetsMole concept 2
Total questions: 20
Worksheet time: 18mins
What is the total number of atoms in 0.20 mol of propanone, CH3COCH3?
1.2 × 1022
6.0 × 1023
1.2 × 1023
6.0 × 1024
How many hydrogen atoms are in one mole of ethanol, C2H5OH?
1.00 × 1023
3.61 × 1024
5.00
6.00
What are the units for molar mass?
g
amu
g mol-1
L
A 5.00 g sample of a compound consisting of calcium and chlorine contains 1.82 g of calcium and 3.23 g of chlorine. What is the empirical formula?
CaCl2
Ca2Cl4
Ca2Cl2
Ca4Cl2
A 154 g sample of a compound contains 15.01 g of C and 62.03 g of Cl. What is the empirical formula for this compound?
CCl3
CCl4
C4Cl
CCl
What is the empirical formula for:
C3H18
CHO
CO6
CH2
CH6
What is the empirical formula for:
C2H6O4
CHO
CH2O
CO2
CH3O2
Which of the following is NOT an empirical formula?
FeCl2
C8H18
C4H8O
C3H8
A compound with an empirical formula of CH2 has a molar mass of 70 g/mol. What is its molecular formula?
C5H10
C2H4
CH2
C4H8
What is the empirical formula of octanoic acid, C8H16O2?
C2H4O
CH2O
C4H8O
C8H16O2
A chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound is called_________
ionic formula
covalent formula
empirical formula
molecular formula
What is the empirical formula of the following molecular formula: C3H6
C3H6
CH2
C2H4
CH3
What is Avogadro's Number?
6.02 x 1023
- 6.02 1023
6.02 x 1022
6,020,000,000,000
A mole of Neon contains6.02 x 1023 _____.
molecules
formula units
ions
atoms
One mole of carbon dioxide (CO2) contains 6.02 x 1023 _____.
atoms
molecules
formula units
ions
A mole is the SI unit for:
mass
volume
amount of a substance
area
What is the molar mass of NaCl?
28 g/mol
58.5 g/mol
12 g/mol
6.02 x 1023
