WorksheetsCounting Atoms in Chemical Formulas
Total questions: 36
Worksheet time: 1hrs 14mins
How many oxygen atoms (O) are in a CO2 molecule?
(a)
How many Oxygen atoms (O) are in a molecule of 7CO2
(a)
How many Hydrogen atoms (H) are in a molecule of 2H2O?
(a)
How many COMPOUNDS of sugar are there 3C6H12O6?
(a)
Which is the correct formula for:
six hydrogen (H)
two sulfur (S)
eight oxygen (O)
2H3SO4
2HSO4
2H4S3O
2H2O
How many atoms are there TOTAL in:
CaH2(SO4)2
(a)
How many Oxygen atoms (O) are in a molecule of 2Ca3(CO2)4
(a)
How many carbon atoms (C) are in a 3NaCO2 molecule?
(a)
How many Hydrogen atoms (H) are in a molecule of 5Li3H6O?
(a)
How many atoms of carbon (C) are in C6H12O6?
(a)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
How many atoms are there TOTAL in:
H2SO4
(a)
How many Sodium (Na) are in 6NaCl?
(a)
How many oxygen atoms are in 6H2O ?
1
2
6
How many chlorine atoms are in NaClO4 ?
1
2
4
How many hydrogen atoms are in Pb(HCO3)4 ?
1
3
4
How many sulfur atoms are in H2SO4 ?
1
2
4
How many molecules are represented by 2C6H12O6 ?
(a)
How many atoms are in one molecule of C12H22O11 ?
(a)
How many atoms/ions are in one formula unit of Zn(C2H3O2)2 ?
(a)
Match the description with the number
3Mn2(CO3)7
Total number of atoms in the compound
21
Number of carbon atoms
63
Number of oxygen atoms
6
Number of Manganese atoms
3
Number of compounds
Match the numbers with the correct description
4N2(SO4)3
Number of Nitrogen atoms
12
Number of Sulfur atoms
48
Number of Oxygen atoms
68
Total number of atoms in the compound
4
Number of compounds present
How many carbon atoms are in 3CH3CH3CH2CH2CH2CH3 ?
(a)
Match the numbers with the descriptions
3Pb4(NO3)2
Number of compounds
12
Number of Lead atoms
6
Number of Nitrogen atoms
18
Number of Oxygen atoms
36
Total number of atoms in the compound
How many elements of carbon (C) are in 6C6H12O6?
(a)
3(NH₄)₂CrO₄
Number of N: (a)
Number of H: (b)
Number of Cr: (c)
Number of O: (d)
How many elements are in 2 C6H12O7? (a)
How many C: (b)
How many H: (c)
How many O: (d)
How many TOTAL atoms: (e)
How many carbon atoms are there?
2
3
8
16
How many atoms of oxygen are there?
0
1
2
3
C3H5(NO3)3
C = 3, H = 5, N = 3, O = 9
C = 3, H = 5, N = 1, O = 9
C = 9, H = 15, N = 3, O = 9
C = 9, H = 15, N = 1, O = 3
The compound Fe2(CO3)3 contains how many atoms of each element?
2 iron, 1 carbon, 6 oxygen
2 iron, 3 carbon, 6 oxygen
6 iron, 3 carbon, 9 oxygen
2 iron, 3 carbon, 9 oxygen
