Chemical Formulas and Equations

Question #1: The formula weight of C₆H₁₂O₆ is

(A). 180 u
(B). 72 u
(C). 29 u
(D). 24 u

#1 Answer

Question #2: The number of sulfur atoms in Al₂(SO₄)₃ is

(A). 3
(B). 4
(C). 7
(D). 12

#2 Answer

Question #3: The formula for a compound is given as C₂H₂. This is a (an)

(A). empirical formula.
(B). molecular formula.
(C). structural formula.
(D). redundant formula.

#3 Answer

Question #4: What number should be in front of H₂SO₄ in the equation below?

(A). 1
(B). 2
(C). 3
(D). 4

#4 Answer

Question #5: The equation below is balanced by placing what number in front of the carbon dioxide?

(A). 4
(B). 6
(C). 10
(D). 14

#5 Answer

Question #6: Which of the following equations is balanced?

Question #7: Which of the following represents a replacement reaction?

Question #8: Which of the following represents a combination reaction?

Question #9: Which of the following represents an ion exchange reaction?

Question #10: Which of the following would not result in a reaction?

Question #11: If the atomic mass of oxygen is 16 u and Avogadro's number is 6.02 X 10²³ particles per mole, then one mole of ozone, O₃, contains

(A). 6.02 X 10²³ molecules.
(B). 12.04 X 10²³ molecules.
(C). 18.06 X 10²³ molecules.
(D). 9.63 X 10²⁴ molecules.

#11 Answer

Question #12: How many moles of hydrogen atoms are present in 1 mole of H₂O?

(A). 1
(B). 2
(C). 3
(D). 4

#12 Answer

Question #13: The mass of 6.02 X 10²³ atoms of gold (Au) is

(A). 79 g
(B). 197 g
(C). 475.6 X 10²³ g
(D). 1,186 X 10²³ g

#13 Answer

Question #14: How many moles of oxygen atoms are present in 1 mole of H₂O?

(A). 1/2
(B). 1
(C). 2
(D). 3

#14 Answer

Question #15: The formula weight of carbon dioxide, CO₂ is

(A). 28 u
(B). 44 u
(C). 56 u
(D). 72 u

#15 Answer