Question 1

Which of the following is the oxidation number of magnesium in an ionic compound?

Accepted Answer

A) 0 
B) 1+ 
C) 1- 
D) 2+ 
A) 0 
B) 1+ 
C) 1- 
D) 2+ D

Question 2

If necessary, use the periodic table to answer the following question. Click here to open the periodic table in a new tab
How many elements are in period 3 of the periodic table?

Accepted Answer

A) 3 
B) 8 
C) 4 
D) 10 
A) 3 
B) 8 
C) 4 
D) 10 B

Question 3

What is 6,987,000 in scientific notation?

Accepted Answer

A) 6)987 x 106 
B) 0)6987 x 107 
C) 6)987 x 105 
D) 69.87 x 105 
A) 6)987 x 106 
B) 0)6987 x 107 
C) 6)987 x 105 
D) 69.87 x 105 D

Question 4

Which of the following is not a simple sugar?

Accepted Answer

A) Dextrose 
B) Glucose 
C) Glycogen 
D) Fructose 
A) Dextrose 
B) Glucose 
C) Glycogen 
D) Fructose

Question 5

What type of reaction is shown below:
2C5H5 + Fe → Fe(C5H5)2

Accepted Answer

A) Synthesis 
B) Decomposition 
C) Double displacement 
D) Single displacement 
A) Synthesis 
B) Decomposition 
C) Double displacement 
D) Single displacement

Question 6

F-21 has a half-life of 5 seconds. How long will it take a 50 g sample of F-21 to decay to a mass of 12.5 g?

Accepted Answer

A) 15s 
B) 10s 
C) 20s 
D) 25s 
A) 15s 
B) 10s 
C) 20s 
D) 25s

Question 7

Which of the following is the atomic number for the element francium?

Accepted Answer

A) 88 
B) 223 
C) 87 
D) 348 
A) 88 
B) 223 
C) 87 
D) 348

Question 8

What does the atomic mass of an element represent?

Accepted Answer

A) The number of protons and neutrons in one atom 
B) The average mass of all isotopes of that element 
C) The number of protons in one atom 
D) The number of protons, neutrons, and electrons in one atom 
A) The number of protons and neutrons in one atom 
B) The average mass of all isotopes of that element 
C) The number of protons in one atom 
D) The number of protons, neutrons, and electrons in one atom

Question 9

Which subatomic particle has a positive charge?

Accepted Answer

A) Electrons 
B) Protons 
C) Photons 
D) Neutrons 
A) Electrons 
B) Protons 
C) Photons 
D) Neutrons

Question 10

Which metric prefix is represented numerically by 10-3?

Accepted Answer

A) kilo- 
B) milli- 
C) centi- 
D) deci- 
A) kilo- 
B) milli- 
C) centi- 
D) deci-

Question 11

Cesium-137 has a half-life of 30 years. If a 2.0 g sample of cesium-137 decays over 120 years, how much would remain?

Accepted Answer

A) 0.25 g 
B) 1.4 g 
C) 0.5 g 
D) 0.125 g 
A) 0.25 g 
B) 1.4 g 
C) 0.5 g 
D) 0.125 g

Question 12

Which is the strongest intramolecular force?

Accepted Answer

A) Ionic bonding 
B) Metallic bonding 
C) Polar covalent bond 
D) Nonpolar covalent bond 
A) Ionic bonding 
B) Metallic bonding 
C) Polar covalent bond 
D) Nonpolar covalent bond

Question 13

Why does increasing the surface area of reactants or catalysts increase the rate of a reaction?

Accepted Answer

A) It introduces charges on the surface of the particles, which makes them more reactive. 
B) It reduces the amount of precipitate that is formed during the reaction. 
C) The activation energy of the reaction is lowered. 
D) It increases the likelihood of molecules encountering one another. 
A) It introduces charges on the surface of the particles, which makes them more reactive. 
B) It reduces the amount of precipitate that is formed during the reaction. 
C) The activation energy of the reaction is lowered. 
D) It increases the likelihood of molecules encountering one another.

Question 14

During which type of radiation is a Helium nucleus emitted?

Accepted Answer

A) Alpha radiation 
B) Beta radiation 
C) Gamma radiation 
D) Positron emission 
A) Alpha radiation 
B) Beta radiation 
C) Gamma radiation 
D) Positron emission

Question 15

On which of the following temperature scales can a negative number not exist?

Accepted Answer

A) Kelvin 
B) Fahrenheit 
C) Celsius 
D) Joule 
A) Kelvin 
B) Fahrenheit 
C) Celsius 
D) Joule

Question 16

How many protons does the element xenon (Xe) have?

Accepted Answer

A) 55 
B) 18 
C) 54 
D) 53 
A) 55 
B) 18 
C) 54 
D) 53

Question 17

Which of the following shows a double displacement reaction?

Accepted Answer

A) Fe + Pb(NO3)2 → Pb + Fe(NO3)2 
B) Fe + CuSO4 → Cu + FeSO4 
C) CH4 + 2O2 → 2H2O + CO2 
D) AgNO3 + NaCl → AgCl + NaNO3 
A) Fe + Pb(NO3)2 → Pb + Fe(NO3)2 
B) Fe + CuSO4 → Cu + FeSO4 
C) CH4 + 2O2 → 2H2O + CO2 
D) AgNO3 + NaCl → AgCl + NaNO3

Question 18

What is the other name for the metric system?

Accepted Answer

A) The Imperial System 
B) International System of Units 
C) The Official Measurement System 
D) The English System 
A) The Imperial System 
B) International System of Units 
C) The Official Measurement System 
D) The English System

Question 19

If a solution is neutral, where would its pH lie?

Accepted Answer

A) 7)0 
B) Above 7.0 
C) Below 7.0 
D) 0 
A) 7)0 
B) Above 7.0 
C) Below 7.0 
D) 0

Question 20

Which type of reaction below represents an acid-base reaction?

Accepted Answer

A) 3 HBr + Al(OH)3 → 3 H2O + AlBr3 
B) 2 NH3 + H2SO4 → (NH4)2SO4 
C) MgCl2 + Li2CO3 → MgCO3 + 2 LiCl 
D) 2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH 
A) 3 HBr + Al(OH)3 → 3 H2O + AlBr3 
B) 2 NH3 + H2SO4 → (NH4)2SO4 
C) MgCl2 + Li2CO3 → MgCO3 + 2 LiCl 
D) 2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH

Which of the following is the oxidation number of magnesium in an ionic compound?

If necessary, use the periodic table to answer the following question. Click here to open the periodic table in a new tab How many elements are in period 3 of the periodic table?

What is 6,987,000 in scientific notation?

Which of the following is not a simple sugar?

What type of reaction is shown below: 2C₅H₅ + Fe → Fe(C₅H₅)₂

F-21 has a half-life of 5 seconds. How long will it take a 50 g sample of F-21 to decay to a mass of 12.5 g?

Which of the following is the atomic number for the element francium?

What does the atomic mass of an element represent?

Which subatomic particle has a positive charge?

Which metric prefix is represented numerically by 10^-3?

Cesium-137 has a half-life of 30 years. If a 2.0 g sample of cesium-137 decays over 120 years, how much would remain?

Which is the strongest intramolecular force?

Why does increasing the surface area of reactants or catalysts increase the rate of a reaction?

During which type of radiation is a Helium nucleus emitted?

On which of the following temperature scales can a negative number not exist?

How many protons does the element xenon (Xe) have?

Which of the following shows a double displacement reaction?

What is the other name for the metric system?

If a solution is neutral, where would its pH lie?

Which type of reaction below represents an acid-base reaction?

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Exam 1: HESI-A2-Chemistry

Which of the following is the oxidation number of magnesium in an ionic compound?

If necessary, use the periodic table to answer the following question. Click here to open the periodic table in a new tab How many elements are in period 3 of the periodic table?

What is 6,987,000 in scientific notation?

Which of the following is not a simple sugar?

What type of reaction is shown below: 2C5H5 + Fe → Fe(C5H5)2

F-21 has a half-life of 5 seconds. How long will it take a 50 g sample of F-21 to decay to a mass of 12.5 g?

Which of the following is the atomic number for the element francium?

What does the atomic mass of an element represent?

Which subatomic particle has a positive charge?

Which metric prefix is represented numerically by 10-3?

Cesium-137 has a half-life of 30 years. If a 2.0 g sample of cesium-137 decays over 120 years, how much would remain?

Which is the strongest intramolecular force?

Why does increasing the surface area of reactants or catalysts increase the rate of a reaction?

During which type of radiation is a Helium nucleus emitted?

On which of the following temperature scales can a negative number not exist?

How many protons does the element xenon (Xe) have?

Which of the following shows a double displacement reaction?

What is the other name for the metric system?

If a solution is neutral, where would its pH lie?

Which type of reaction below represents an acid-base reaction?

HESI-A2-Math

HESI-A2-Vocabulary

HESI-A2-Reading

HESI-A2-Grammar

HESI-A2-Biology

HESI-A2-Physics

HESI-A2-Anatomy & Physiology

Filters

What type of reaction is shown below: 2C₅H₅ + Fe → Fe(C₅H₅)₂

Which metric prefix is represented numerically by 10^-3?