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Formula Analysis

Total questions: 45

Worksheet time: 37mins

Name
Class
Date
1.

How many Hydrogen atoms are in 4H2O?

a)

6

b)

8

c)

2

d)

4

2.

How many molecules in the following 4H2O?

a)

6

b)

8

c)

2

d)

4

3.

How many Oxygen atoms are in H2O?

a)

1

b)

2

c)

0

d)

4

4.

How many Magnesium atoms are in 10MgCl2?

a)

10

b)

5

c)

20

5.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
6.

How many atoms are there TOTAL in H2SO4 ?

a)

6

b)

5

c)

7

d)

3

7.

How many Sodium atoms are in 6NaCl?

a)

1

b)

12

c)

6

8.

How many Nitrogen atoms are in (NH₄)₂CrO₄?

a)

1

b)

2

c)

8

d)

16

9.

What is C2H8O ?

a)

Element

b)

Letters

c)

Numbers

d)

Compound

10.

How many Oxygen atoms are in Al₂(SO₄)₃?

a)

4

b)

12

c)

7

d)

24

11.

How many Hydrogen atoms in 3(NH₄)₂CrO₄?

a)

4

b)

2

c)

8

d)

24

12.

A subscript is the small number below the element symbol that tells the number of _______ of that element.

a)

atoms

b)

valence electrons

c)

protons

d)

elements

13.

How many Nitrogen atoms are in the in H2C3O4N5?

a)

2

b)

3

c)

4

d)

5

14.

How many Aluminum atoms are in Al2O3?

a)

3

b)

2

c)

5

d)

1

15.

How many elements are present in this compound? (Careful!)

Mg2As3COHNi2

a)

2

b)

4

c)

6

d)

10

16.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

2

c)

only 1

d)

1 million

17.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
18.

What does the subscript in a chemical formula tell you?

a)

How many molecules are present

b)

How many atoms are present

c)

How many elements are present

d)

How many neutrons are present

19.

Is this an element or a compound?  CaSO4CaSO_4  

a)

Element

b)

Compound

20.

Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?

a)

niF2

b)

NIF2

c)

Ni1F2

d)

NiF2

21.

Which element has the greatest number of atoms?  AgNO3AgNO_3  

a)

Silver

b)

Gold

c)

Nitrogen

d)

Oxygen

22.

How many atoms of magnesium (Mg) are in the compound Al2MgO4

a)

7

b)

4

c)

2

d)

1

23.

A tall number in front of a chemical formula. It indicates the number of molecules present.

a)

Coefficient

b)

Subscript

c)

Exponent

d)

Coordinator

24.

5 N2O represents the laughing gas you might have at the dentist. How many atoms of nitrogen are present here?

a)

1

b)

2

c)

7

d)

10

25.

We used baking soda before in a chemical reaction. How many molecules of it are represented here? 3 NaHCO3

a)

1

b)

3

c)

4

26.

Table salt is made of sodium and chlorine. How many atoms of chlorine are present in: 4 NaCl

a)

1

b)

2

c)

4

d)

8

27.

How many elements are in: 4 NaCl (salt)

a)

1

b)

2

c)

4

d)

8

28.

Glucose (C6H12O6) is considered a compound because it is made up of two or more

a)

molecules

b)

elements

c)

gases

d)

soilds

29.

How many atoms of each element are in:  H2SO4 
 ?

a)
2 hydrogen, 1 sulfur, 4 oxygen
b)
1 hydrogen, 2 sulfur, 4 oxygen
c)
2 hydrogen & 4 sodium
d)
1 hydrogen & 6 sodium
30.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
31.

Which of these formulas contain equal numbers of nitrogen atoms?

a)

Formulas I and III

b)

Formulas I and IV

c)

Formulas I, II and V

d)

Formulas II and III

32.

How many atoms of each element are in this chemical formula?

CH4COOH2

a)

2 Carbon atoms, 8 Hydrogen Atoms, 4 Oxygen atoms

b)

4 Carbon atoms, 6 Hydrogen atoms, 4 Oxygen atoms

c)

2 Carbon atoms, 6 Hydrogen atoms, 2 Oxygen atoms

d)

1 Carbon atom, 2 Hydrogen atoms, 2 Oxygen atoms

33.

How many total atoms do you have for each element in this chemical formula?


P2OOH2O2H6

a)

P = 2, O = 4, H = 8

b)

P = 1, O = 3, H = 2

c)

P = 2, O = 3, H = 8

d)

P = 2, O = 4, H = 3

34.

How many Chlorine atoms are in 2MgCl2?

a)

4

b)

2

c)

6

d)

1

35.

How many elements are present in the compound Na2SO4?

a)

2

b)

1

c)

3

d)

4

36.

How many total atoms are in one molecule of NH3?

a)

5

b)

4

c)

3

d)

2

37.

Coefficients in chemical formulas...

a)

Multiply just the first atom

b)

Add to the subscripts at the end of the molecule

c)

Multiply elements without subscripts

d)

Multiply EVERYTHING!

38.

The ______ are numbers found on the lower right-hand side of an element symbol.

a)

Coefficient

b)

Exponent

c)

Multiplier

d)

Subscript

39.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

40.

How many different elements are present in this molecule?

3 NH4C2H3O2

a)

15

b)

36

c)

5

d)

4

41.

A ______ is a number written in front of a chemical formula.

a)

Coefficient

b)

Subscript

c)

Exponent

d)

Coordinator

42.

Coefficients tell the number of __________ in a formula.

a)

Molecules

b)

Atoms

c)

Elements

d)

Oxygen

43.

Examples are water (H2O) and carbon dioxide (CO2).

a)

elements

b)

compounds

44.

Which element has the greatest number of atoms? AgNO3AgNO_3  

a)

Silver

b)

Gold

c)

Nitrogen

d)

Oxygen

45.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O

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