PORTAGE LEARNING CHEM 104 MODULE
ONE TO SIX CERTIFICATION SCRIPT 2026
PRACTICE SOLUTIONS GRADED A+
⩥ How many atoms of sulfur are present in a 155 g sample of sulfur?
[Molar mass: S, 32.06 g/mol]
Answer: 2.91 × 1024 atoms
⩥ Which of the following is NOT a unit for measuring pressure?
Answer: kJ
⩥ A solution contains 1.65 g of NaF in a total volume of 150.0 mL.
What is its concentration expressed as % (m/V)?
Answer: 1.10%
⩥ Choose the best classification of the reaction represented by the
following equation: C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l)
Answer: combustion
⩥ What is the number 0.0062985632 written in scientific notation to
three significant figures?
Answer: 6.30 × 10^−3
,⩥ How many aspirin molecules are present in a 0.325 g sample of
aspirin? [Molar mass: aspirin, 180.2 g/mol]
Answer: 1.09 × 1021 molecules
⩥ Which gas under the specified conditions would come closest to
exhibiting ideal gas behavior?
Answer: H2 at low pressure and high temperature
⩥ Choose the best classification of the reaction represented by the
following equation: Na2SO4(aq) + Ba(OH)2(aq) → BaSO4(s) +
2NaOH(aq)
Answer: double-replacement
⩥ What does it mean if an atom is said to have a high electronegativity?
Answer: The atom has a strong attraction for electrons in a chemical
bond.
⩥ The chemical equation below is unbalanced. What is the coefficient of
water when the equation is balanced?
Mg(OH)2(s) + HCl(g) → MgCl2(s) + H2O(l)
Answer: 2
, ⩥ Diamond is a pure form of the element carbon. If a 2 carat diamond
has a mass of 0.396 g, how many carbon atoms are contained in this
diamond?
Answer: 1.99 × 1022 atoms
⩥ Which of the following is NOT a type of mixture?
Answer: compound
⩥ Which statement INCORRECTLY describes what happens to a
sample of gas when it experiences an increase in temperature?
Answer: The number of gas particles increases.
⩥ How is the reaction shown below best classified?
2NaCl(s) + F2(g) → 2NaF(s) + Cl2(g)
Answer: single-replacement
⩥ Which statement concerning the scientific method is FALSE?
Answer: A hypothesis becomes a theory when a single experiment
supports it.
⩥ Which symbol, often found in chemical equations, indicates that a
substance is dissolved in water?
ONE TO SIX CERTIFICATION SCRIPT 2026
PRACTICE SOLUTIONS GRADED A+
⩥ How many atoms of sulfur are present in a 155 g sample of sulfur?
[Molar mass: S, 32.06 g/mol]
Answer: 2.91 × 1024 atoms
⩥ Which of the following is NOT a unit for measuring pressure?
Answer: kJ
⩥ A solution contains 1.65 g of NaF in a total volume of 150.0 mL.
What is its concentration expressed as % (m/V)?
Answer: 1.10%
⩥ Choose the best classification of the reaction represented by the
following equation: C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l)
Answer: combustion
⩥ What is the number 0.0062985632 written in scientific notation to
three significant figures?
Answer: 6.30 × 10^−3
,⩥ How many aspirin molecules are present in a 0.325 g sample of
aspirin? [Molar mass: aspirin, 180.2 g/mol]
Answer: 1.09 × 1021 molecules
⩥ Which gas under the specified conditions would come closest to
exhibiting ideal gas behavior?
Answer: H2 at low pressure and high temperature
⩥ Choose the best classification of the reaction represented by the
following equation: Na2SO4(aq) + Ba(OH)2(aq) → BaSO4(s) +
2NaOH(aq)
Answer: double-replacement
⩥ What does it mean if an atom is said to have a high electronegativity?
Answer: The atom has a strong attraction for electrons in a chemical
bond.
⩥ The chemical equation below is unbalanced. What is the coefficient of
water when the equation is balanced?
Mg(OH)2(s) + HCl(g) → MgCl2(s) + H2O(l)
Answer: 2
, ⩥ Diamond is a pure form of the element carbon. If a 2 carat diamond
has a mass of 0.396 g, how many carbon atoms are contained in this
diamond?
Answer: 1.99 × 1022 atoms
⩥ Which of the following is NOT a type of mixture?
Answer: compound
⩥ Which statement INCORRECTLY describes what happens to a
sample of gas when it experiences an increase in temperature?
Answer: The number of gas particles increases.
⩥ How is the reaction shown below best classified?
2NaCl(s) + F2(g) → 2NaF(s) + Cl2(g)
Answer: single-replacement
⩥ Which statement concerning the scientific method is FALSE?
Answer: A hypothesis becomes a theory when a single experiment
supports it.
⩥ Which symbol, often found in chemical equations, indicates that a
substance is dissolved in water?
