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Worksheets7a Chemical Formulas
Total questions: 15
Worksheet time: 8mins
How many elements are in C6H12O6?
24
2
3
4
Is O2 an element or a compound?
Element
Compound
Is H2O an element or a compound?
element
compound
Which formula shows three hydrogen (H), one sulfur (S), and four oxygen (O) atoms?
H3SO4
HSO4
H4S3O
H2O
How many atoms are there in total in:
H2SO4
6
8
7
3
How many carbon atoms are in the formula C6H12O6?
3
6
12
24
What is the correct chemical formula for a molecule with one carbon atom (C) and two oxygen atoms (O)?
CO2
CO
C2O
2CO
In the picture below, what do the blue numbers stand for?
superscripts
coefficients
subscripts
How many Sodium (Na) atoms are there in 6NaCl?
1
12
6
If there is no subscript next to an element in a chemical formula, how many atoms of that element are there?
0
2
1
1000
What is the simplest formula for C4H6?
CH
CH3
C2H3
C4H6
What is the simplest formula for C25H45?
C25H45
CH
C5H9
C9H5
What is the correct chemical formula for a molecule with two nitrogen atoms (N) and five hydrogen atoms (H)?
N2H5
N5H2
NH2
NH5
How many atoms are in a molecule of:
CO2
2
3
1
4
What is the simplest formula for C2H4?
C4H8
CH2
CH
C2H4
