Question 1

The enthalpy change of a reaction is the heat transferred between the reaction and its surroundings at constant ________.

Accepted Answer

pressure

Question 2

When the equivalence point of a titration has been reached, the following statements apply. Please select all that apply.

Accepted Answer

A)  There are equal volumes of reagents. 
B)  The amount of reagent added from the burette has reacted exactly with the solution in the conical flask. 
C)  There are equal amounts (mass) of reagents. 
D)  An indicator added would change colour at this point. 
A)  There are equal volumes of reagents. 
B)  The amount of reagent added from the burette has reacted exactly with the solution in the conical flask. 
C)  There are equal amounts (mass) of reagents. 
D)  An indicator added would change colour at this point. B, D

Question 3

London dispersion interactions arise because of the instantaneous ______ that can exist due to the uneven electron distribution within a molecule at a particular instant. This induces a dipole in an adjacent molecule.

Accepted Answer

dipole

Question 4

What mass (in g) of gold contains 8.9 mol of Au?

Accepted Answer

A)  12 g. 
B)  0.045 g. 
C)  1753.033 g. 
D)  6.022 × 1023 g. 
A)  12 g. 
B)  0.045 g. 
C)  1753.033 g. 
D)  6.022 × 1023 g.

Question 5

How many moles of molecules are contained in 232 g of SiO2?

Accepted Answer

A)  0.26 mol. 
B)  3.86 mol. 
C)  13939.49 mol. 
D)  5.26 mol. 
A)  0.26 mol. 
B)  3.86 mol. 
C)  13939.49 mol. 
D)  5.26 mol.

Question 6

The systematic name for SF6 is sulphur ____fluoride

Accepted Answer

Question 7

The number of atoms of xenon in 1 mole is equal to _________ constant.

Accepted Answer

The answer of The number of atoms of xenon in...

Question 8

Match the transition between two states of matter with the enthalpy change for the process.
-ΔfusHo

Accepted Answer

A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid 
A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid

Question 9

Which of the following will alter the position of equilibrium of a reaction in dynamic equilibrium? Please select all that apply.

Accepted Answer

A)  Pressure of reacting gases. 
B)  Temperature of reacting solution. 
C)  Concentration of reacting substances in solution. 
D)  Time. 
A)  Pressure of reacting gases. 
B)  Temperature of reacting solution. 
C)  Concentration of reacting substances in solution. 
D)  Time.

Question 10

Match the transition between two states of matter with the enthalpy change for the process.
-Δreverse subHo

Accepted Answer

A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid 
A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid

Question 11

Chemists commonly use the Kelvin (T / K) and Celsius (θ / °C) temperature scales. Match the values in Celsius to the equivalent value on the kelvin temperature scale.
-100 °C

Accepted Answer

A)  373.15 K 
B)  273.15 K 
C)  0 K 
D)  298 K 
A)  373.15 K 
B)  273.15 K 
C)  0 K 
D)  298 K

Question 12

What is the oxidation state of N in KNO2?

Accepted Answer

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

Question 13

When a chemical bond is broken, energy is required to break the bond. This means the bond breaking process is endothermic.

Accepted Answer

A) True 
 B)False

Question 14

Systeme International d'Unites is the internationally recognised system of metric units. The system has _____ base units from which all other SI units can be derived.

Accepted Answer

The answer of Systeme International d'Unites is the internationally recognised...

Question 15

Match the following brief description with the correct term:
-involves the formation of a complex

Accepted Answer

A)  Acid-base reaction 
B)  Precipitation reaction 
C)  Redox reaction 
D)  Complexation reaction 
A)  Acid-base reaction 
B)  Precipitation reaction 
C)  Redox reaction 
D)  Complexation reaction

Question 16

Match the non-covalent interaction with an example of a molecule pair that the non-covalent interaction acts between.
-Dipole-dipole

Accepted Answer

A)  C2H6, C4H10 
B)  CHCl3, CH3OH 
C)  Na+ and H2O 
D)  CH3OH, H2O 
A)  C2H6, C4H10 
B)  CHCl3, CH3OH 
C)  Na+ and H2O 
D)  CH3OH, H2O

Question 17

23.75 g of potassium iodide was dissolved in water and the solution made up to 250 cm3. What is the concentration of the solution in mol dm-3?

Accepted Answer

A)  0.38 
B)  0.57 
C)  95 
D)  0.095 
A)  0.38 
B)  0.57 
C)  95 
D)  0.095

Question 18

H2 (g) + I2 (g) → 2HI (g) Construct an expression for the equilibrium constant Kp in terms of partial pressures of the reactant and product gases.

Accepted Answer

A) 
$K_{\rho}=\frac{\rho_{H}^{2}}{\rho_{\mathrm{H}_{2}} \rho_{l2}}$ 
B) 
$K_{\rho}=\frac{2 p_{\mathrm{Hl}}}{p_{\mathrm{H}_{2}} \rho_{l2}}$ 
C) 
$K_{P}=\frac{\rho_{\mathrm{HI}}}{\rho_{\mathrm{H}_{2}}+\rho_{l2}}$ 
D) 
$K_{\rho}=\frac{\rho_{H_{2}}\rho_{l2}}{\rho_{H 1}^{2}}$ 
A) 
$K_{\rho}=\frac{\rho_{H}^{2}}{\rho_{\mathrm{H}_{2}} \rho_{l2}}$ 
B) 
$K_{\rho}=\frac{2 p_{\mathrm{Hl}}}{p_{\mathrm{H}_{2}} \rho_{l2}}$ 
C) 
$K_{P}=\frac{\rho_{\mathrm{HI}}}{\rho_{\mathrm{H}_{2}}+\rho_{l2}}$ 
D) 
$K_{\rho}=\frac{\rho_{H_{2}}\rho_{l2}}{\rho_{H 1}^{2}}$

Question 19

The balanced equation for the combustion of sucrose in a plentiful supply of air is: C12H22O11 (s) + 12 O2 (g) → 12 CO2 (g) + 11 H2O (l). What mass of oxygen is needed to react exactly with 500 g of sucrose?

Accepted Answer

A)  6000 g. 
B)  578 g. 
C)  384 g. 
D)  500 g. 
A)  6000 g. 
B)  578 g. 
C)  384 g. 
D)  500 g.

Question 20

Match the following brief description with the correct term:
-involves the formation of a solid product when two solutions are mixed

Accepted Answer

A)  Acid-base reaction 
B)  Precipitation reaction 
C)  Redox reaction 
D)  Complexation reaction 
A)  Acid-base reaction 
B)  Precipitation reaction 
C)  Redox reaction 
D)  Complexation reaction

Exam 1: Fundamentals

The enthalpy change of a reaction is the heat transferred between the reaction and its surroundings at constant ________.

When the equivalence point of a titration has been reached, the following statements apply. Please select all that apply.

London dispersion interactions arise because of the instantaneous ______ that can exist due to the uneven electron distribution within a molecule at a particular instant. This induces a dipole in an adjacent molecule.

What mass (in g) of gold contains 8.9 mol of Au?

How many moles of molecules are contained in 232 g of SiO2?

The systematic name for SF6 is sulphur ____fluoride

The number of atoms of xenon in 1 mole is equal to _________ constant.

Match the transition between two states of matter with the enthalpy change for the process. -ΔfusHo

Which of the following will alter the position of equilibrium of a reaction in dynamic equilibrium? Please select all that apply.

Match the transition between two states of matter with the enthalpy change for the process. -Δreverse subHo

Chemists commonly use the Kelvin (T / K) and Celsius (θ / °C) temperature scales. Match the values in Celsius to the equivalent value on the kelvin temperature scale. -100 °C

What is the oxidation state of N in KNO2?

When a chemical bond is broken, energy is required to break the bond. This means the bond breaking process is endothermic.

Systeme International d'Unites is the internationally recognised system of metric units. The system has _____ base units from which all other SI units can be derived.

Match the following brief description with the correct term: -involves the formation of a complex

Match the non-covalent interaction with an example of a molecule pair that the non-covalent interaction acts between. -Dipole-dipole

23.75 g of potassium iodide was dissolved in water and the solution made up to 250 cm3. What is the concentration of the solution in mol dm-3?

H2 (g) + I2 (g) → 2HI (g) Construct an expression for the equilibrium constant Kp in terms of partial pressures of the reactant and product gases.

The balanced equation for the combustion of sucrose in a plentiful supply of air is: C12H22O11 (s) + 12 O2 (g) → 12 CO2 (g) + 11 H2O (l). What mass of oxygen is needed to react exactly with 500 g of sucrose?

Match the following brief description with the correct term: -involves the formation of a solid product when two solutions are mixed

The Language of Organic Chemistry

Atomic Structure and Properties

Diatomic Molecules

Polyatomic Molecules

Solids

Acids and Bases

Gases

Reaction Kinetics

Molecular Spectroscopy

Analytical Chemistry

Molecular Characterisation

Energy and Thermochemistry

Entropy and Gibbs Energy

Electrochemistry

Phase Equilibrium and Solutions

Isomerism and Stereochemistry

Organic Reaction Mechanisms

Halogenoalkanes: Substitution and Elimination Reactions

Alkenes and Alkynes: Electrophilic Addition and Pericyclic Reactions

Benzene and Other Aromatic Compounds: Electrophilic Substitution Reactions

Aldehydes and Ketones: Nucleophilic Addition and Α-Substitution Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution and Α-Substitution Reactions

Hydrogen

S-Block Chemistry

P-Block Chemistry

D-Block Chemistry

Filters

How many moles of molecules are contained in 232 g of SiO₂?

The systematic name for SF₆ is sulphur ____fluoride

Match the transition between two states of matter with the enthalpy change for the process. -Δ_fusH^o

Match the transition between two states of matter with the enthalpy change for the process. -Δ_reverse_subH^o

What is the oxidation state of N in KNO₂?

23.75 g of potassium iodide was dissolved in water and the solution made up to 250 cm³. What is the concentration of the solution in mol dm^-3?

H₂ (g) + I₂ (g) → 2HI (g) Construct an expression for the equilibrium constant K_pin terms of partial pressures of the reactant and product gases.

The balanced equation for the combustion of sucrose in a plentiful supply of air is: C₁₂H₂₂O₁₁ (s) + 12 O₂ (g) → 12 CO₂ (g) + 11 H₂O (l). What mass of oxygen is needed to react exactly with 500 g of sucrose?