CHEM 104 Complete Study Guide Exam Test |Questions &
Answers |100% Verified.
A sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample? [Molar
mass: Al, 26.98 g/mol] - CORRECT: 1.30 g
What is the number 3,000 written in scientific notation using the proper number of significant figures? -
CORRECT: 3 × 10^3
Which statement about the modern periodic table is FALSE? - CORRECT: Elements in the same period
share similar chemical and physical properties.
Which of the following is NOT a unit for measuring pressure? - CORRECT: kJ
A covalent bond involves which of the following? - CORRECT: sharing of electrons between two atoms
Which statement correctly describes what is happening in the reaction shown below?
2Mg(s) + S2(g) → MgS(s) - CORRECT: Mg is oxidized.
Which statement explains why isotopes have different mass numbers? - CORRECT: Isotopes differ in the
number of neutrons each contains
Enough water is added to 50.0 mL of a 0.660 M NaOH solution in order to bring the total volume to 450.0 mL.
What is the molarity of this diluted solution? - CORRECT: 0.0733 M
The unbalanced equation for the combustion of octane, a component of gasoline, is shown below. What would
be the coefficient of carbon dioxide once the equation is balanced?
C8H18(l) + O2(g) → CO2(g) + H2O(l) - CORRECT: 16
When a neutral atom gains one or more electrons, what type of particle is formed? - CORRECT: an anion
What is the name of the ionic compound with the formula Na3PO4? - CORRECT: sodium phosphate
What law predicts the expansion of a balloon when helium is added? - CORRECT: Avogadro's Law
Methanol (CH3OH) is the fuel used by racecars in the Indianapolis 500. It burns in the engine according to the
equation below. How many moles of oxygen gas are necessary to react completely with 12.5 L of methanol?
[Density: CH3OH, 0.7910g/mL; Molar mass: CH3OH, 32.05 g/mol]
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, 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(g) - CORRECT: 463 mol
At what temperature is a liquid converted into a gas? - CORRECT: the boiling point of the liquid
The drug "lithium" is often prescribed to treat mental illness. It is not the element lithium, but the ionic
compound Li2CO3, that is actually administered. What is the name of this compound? - CORRECT:
lithium carbonateConsider the chemical equation shown below. How many moles of oxygen gas are needed to
react with hydrogen to form one mole of water? 2H2(g) + O2(g) → 2H2O(l)
Hydrogen fluoride will react with glass (silicon dioxide, SiO2) according to the equation below. What mass of HF
is required to react completely with 16.0 g of glass? [Molar masses: Si, 28.09 g/mol; F, 19.00 g/mol; H, 1.01
g/mol; O, 16.00 g/mol]
4HF(g) + SiO2(s) → SiF4(g) + 2H2O(g) - CORRECT: 21.3 g
Two molecules of ethane experience what type of attractive forces? - CORRECT: London forces
A solution contains the label 0.2 M KNO3. What is the correct interpretation of this concentration? -
CORRECT: There are 0.2 moles of KNO3 in 1 L of solution.
Which properly represents the Lewis structure of hydrogen sulfide, H2S? - CORRECT:
If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the
solution? [Molecular weight: HCl, 36.46 amu] - CORRECT: 0.0475 M
A patient needs 0.300 g of a solid drug preparation per day. How many 10.0 mg tablets must be given to the
patient per day? - CORRECT: 30.0 tablets
What term is used to describe atoms of the same element that have different masses? - CORRECT:
isotopes
Classify the following reaction: H2SO4(aq) + 2KOH(aq) → K2SO4(aq) + 2H2O(aq) - CORRECT: acid - base
Which of the following statements correctly describes Charles's Law? - CORRECT: The volume of a gas is
directly proportional to the Kelvin temperature of the gas, if the pressure and amount of gas remain constant.
Which statement concerning the elements fluorine, chlorine, bromine, and iodine is FALSE? - CORRECT:
They all have the same electron configuration.
Choose the best classification of the reaction represented by the following equation: MgO(s) + CO2(g) →
MgCO3(s) - CORRECT: combination
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Answers |100% Verified.
A sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample? [Molar
mass: Al, 26.98 g/mol] - CORRECT: 1.30 g
What is the number 3,000 written in scientific notation using the proper number of significant figures? -
CORRECT: 3 × 10^3
Which statement about the modern periodic table is FALSE? - CORRECT: Elements in the same period
share similar chemical and physical properties.
Which of the following is NOT a unit for measuring pressure? - CORRECT: kJ
A covalent bond involves which of the following? - CORRECT: sharing of electrons between two atoms
Which statement correctly describes what is happening in the reaction shown below?
2Mg(s) + S2(g) → MgS(s) - CORRECT: Mg is oxidized.
Which statement explains why isotopes have different mass numbers? - CORRECT: Isotopes differ in the
number of neutrons each contains
Enough water is added to 50.0 mL of a 0.660 M NaOH solution in order to bring the total volume to 450.0 mL.
What is the molarity of this diluted solution? - CORRECT: 0.0733 M
The unbalanced equation for the combustion of octane, a component of gasoline, is shown below. What would
be the coefficient of carbon dioxide once the equation is balanced?
C8H18(l) + O2(g) → CO2(g) + H2O(l) - CORRECT: 16
When a neutral atom gains one or more electrons, what type of particle is formed? - CORRECT: an anion
What is the name of the ionic compound with the formula Na3PO4? - CORRECT: sodium phosphate
What law predicts the expansion of a balloon when helium is added? - CORRECT: Avogadro's Law
Methanol (CH3OH) is the fuel used by racecars in the Indianapolis 500. It burns in the engine according to the
equation below. How many moles of oxygen gas are necessary to react completely with 12.5 L of methanol?
[Density: CH3OH, 0.7910g/mL; Molar mass: CH3OH, 32.05 g/mol]
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, 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(g) - CORRECT: 463 mol
At what temperature is a liquid converted into a gas? - CORRECT: the boiling point of the liquid
The drug "lithium" is often prescribed to treat mental illness. It is not the element lithium, but the ionic
compound Li2CO3, that is actually administered. What is the name of this compound? - CORRECT:
lithium carbonateConsider the chemical equation shown below. How many moles of oxygen gas are needed to
react with hydrogen to form one mole of water? 2H2(g) + O2(g) → 2H2O(l)
Hydrogen fluoride will react with glass (silicon dioxide, SiO2) according to the equation below. What mass of HF
is required to react completely with 16.0 g of glass? [Molar masses: Si, 28.09 g/mol; F, 19.00 g/mol; H, 1.01
g/mol; O, 16.00 g/mol]
4HF(g) + SiO2(s) → SiF4(g) + 2H2O(g) - CORRECT: 21.3 g
Two molecules of ethane experience what type of attractive forces? - CORRECT: London forces
A solution contains the label 0.2 M KNO3. What is the correct interpretation of this concentration? -
CORRECT: There are 0.2 moles of KNO3 in 1 L of solution.
Which properly represents the Lewis structure of hydrogen sulfide, H2S? - CORRECT:
If 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the
solution? [Molecular weight: HCl, 36.46 amu] - CORRECT: 0.0475 M
A patient needs 0.300 g of a solid drug preparation per day. How many 10.0 mg tablets must be given to the
patient per day? - CORRECT: 30.0 tablets
What term is used to describe atoms of the same element that have different masses? - CORRECT:
isotopes
Classify the following reaction: H2SO4(aq) + 2KOH(aq) → K2SO4(aq) + 2H2O(aq) - CORRECT: acid - base
Which of the following statements correctly describes Charles's Law? - CORRECT: The volume of a gas is
directly proportional to the Kelvin temperature of the gas, if the pressure and amount of gas remain constant.
Which statement concerning the elements fluorine, chlorine, bromine, and iodine is FALSE? - CORRECT:
They all have the same electron configuration.
Choose the best classification of the reaction represented by the following equation: MgO(s) + CO2(g) →
MgCO3(s) - CORRECT: combination
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