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Chemistry 100 Practice Final Exam: Multiple Choice Questions - Prof. Attia, Cheat Sheet of Medicine

Zagazig UniversityMedicine
Prof. Mohamed Attia

A practice final exam for chemistry 100, consisting of 50 multiple-choice questions covering fundamental chemistry concepts. It includes instructions for the exam, such as the time limit, materials allowed, and how to fill out the scantron form. The questions cover topics such as elements, compounds, chemical properties, atomic weight, molar mass, scientific notation, significant figures, percent composition, moles, atomic structure, and chemical nomenclature. It is designed to help students prepare for their final exam by testing their knowledge and problem-solving skills in chemistry. The exam also includes a periodic table and tables of si prefixes, atomic numbers, and masses for reference.

Typology: Cheat Sheet

2023/2024

Available from 11/10/2025

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Chemistry 100 Practice Final Exam
Instructions:
Do not begin the exam until you have been instructed to do so. You have 120 minutes to
complete this exam.
There are 50 multiple choice questions.
You must use a number 2 pencil.
You may use a scientific calculator.
Make sure that you have written your name legibly on the scantron form.
Circle bubbles on the scantron form as best as you can.
Answer all 50 questions.
If you cannot find an answer on the exam that you expected to see then answer the question as
best as you can.
Attached to the end of this exam are tables of SI prefixes, atomic numbers and masses, as
well as the periodic table.
Pick the BEST choice for each question.
Good Luck.
Print Name: ________________________
Signature: __________________________
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pf4
pf5
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Partial preview of the text

Download Chemistry 100 Practice Final Exam: Multiple Choice Questions - Prof. Attia and more Cheat Sheet Medicine in PDF only on Docsity!

Chemistry 100 Practice Final Exam

Instructions:

Do not begin the exam until you have been instructed to do so. You have 120 minutes to complete this exam.

There are 50 multiple choice questions.

You must use a number 2 pencil.

You may use a scientific calculator.

Make sure that you have written your name legibly on the scantron form.

Circle bubbles on the scantron form as best as you can.

Answer all 50 questions.

If you cannot find an answer on the exam that you expected to see then answer the question as best as you can.

Attached to the end of this exam are tables of SI prefixes, atomic numbers and masses, as well as the periodic table.

Pick the BEST choice for each question.

Good Luck.

Print Name: ________________________

Signature: __________________________

  1. Which of the following is an element? A) salt B) silicon C) ammonia D) carbon monoxide
  2. Which of the following is a compound? A) limestone B) astatine C) lithium D) gold
  3. Which of the following is a chemical property? A) Water boils below 100°C on top of a mountain. B) Lead is denser than aluminum C) Oxygen gas supports combustion D) Nitrogen is a gas at room temperature
  4. What is the atomic weight of krypton? A) 39. B) 83. C) 132. D) 78
  5. What is the molar mass of Fe2O3? A) 21. B) 87. C) 127. D) 159.
  6. What is 356 expressed in scientific notation? A) 35.6 x 101 B) 3.56 x 102 C) 3.56 x 103 D) 3.56 x 10-
  7. What is 1.78 x 10-2 expressed as a decimal? A) 0. B) 0. C) 178 D) 1780
  8. The number 9.0652 rounded to three significant figures is A) 9. B) 9. C) 9. D) 9.
  1. 356K equals _______ TK = TC + 273 A) 83C B) -83C C) 629C D) 1.30C
  2. Which of the following masses has the highest precision? A) 900. B) 8400. C) 68. D) 0.
  3. What is the total number of atoms in 2.70 moles of aluminum (NA=6.023 x 1023) A) 1.63 x 1024 B) 1.62 x 1025 C) 6.023 x 1023 D) 1.63 x 10-
  4. How many moles are in 25.8g of sodium? A) 593.1 mol B) 1.12 mol C) 1.55 x 1025 mol D) 4.28 x 10-23 mol
  5. The atomic mass is defined as ________? A) the amount of a substance that contains as many elementary entities as there are atoms in exactly 12g of the N-14 isotope. B) a mass exactly equal to one-twelfth the mass of one C-12 atom. C) a mass of 1mole of units of a substance. D) the amount of a substance that contains as many elementary entities as there are atoms in exactly 12g of the C-12 isotope.
  6. What is the mass in grams of 2.76 x 1017 atoms of calcium? A) 10.81g B) 6.66 x 1042g C) 1.84 x 10-5 g D) 4.15 x 10-
  7. The elements in the Group 2A of the periodic table are known as A) Noble gases B) alkali earth metals C) halogens D) alkaline earth metals

E) alkali metals

  1. Convert 556mL to quarts (1L = 1.06qt) A) 5.89 x 10-1 qt B) 5.89 x 105 qt C) 0.556 qt D) 556000 qt
  2. The average speed of helium gas at room temperature is 1255 m/s. Convert this speed to miles per hour (mph). A) 0.0002166 mph B) 2807 mph C) 561.0 mph D) 869600 mph
  3. Which of the following has a greater mass: 3.0115 x 1024atoms of hydrogen or 2 moles of nickel? A) 2 mole of nickel B) 3.0115 x 1024atoms of hydrogen C) Both the same
  4. A can beverage contains 2.8L of liquid. How many nanoliters is this? A) 1.4 x 10-8nL B) 1.4 nL C) 2.8 x 10-9nL D) 2.8 x 109 nL
  5. How many neutrons are in the nucleus of rubidium-85 atom? A) 85 B) 37 C) 48 D) 122
  6. Which is the correct formula of sodium oxide? A) NaO B) NaO C) Na2O D) Na2O
  7. The chemical name for ClO3 - is “chlorate ion”. Therefore, the name of HClO 3 A) perchloric acid B) chloric acid C) chlorous acid D) hypochlorous acid

54 26

  1. How many moles are in 67g of gold? A) 0.34 mol B) 13199 mol C) 7169 mol D) 0.63 mol
  2. The mass of 1.63 x 1021 silicon atoms is A) 2.71 x 10-23 g B) 4.58 x 1022 g C) 28.08 g D) 7.60 x 10-2 g
  3. How many silicon atoms are there in 1.00g of silicon? A) 1 atom B) 0.0356 atoms C) 2.57 x 1023 atoms D) 2.14 x 1022 atoms
  4. Calculate the number of moles of xenon in 12.0g of xenon. A) 1.00 mol B) 0.0457 mol C) 0.0914 mol D) 7.62 x 10-3 mol
  5. Calculate the molecular mass of potassium permanganate, KMnO4. A) 52 amu B) 70 amu C) 110 amu D) 158 amu
  6. Calculate the mass of 3.00 moles of CF2Cl2. A) 3.00 g B) 174 g C) 363 g D) 1.81 x 1024 g
  7. How many molecules are there in 8.0 g of ozone, O3? A) 3 molecules B) 3.6 x 1024 molecules C) 1.0 x 1023 molecules D) 3.0 x 1023 molecules
  8. How many sulfur atoms are there in 21.0 g of Al2S3? A) 8.42 x 1022 atoms B) 2.53 x 1023 atoms C) 2.14 x 1023 atoms D) 6.02 x 1026 atoms
  1. A compound was discovered whose composition by mass is 85.6% C and 14.4% H. Which of these choices could be the molecular formula of this compound? A) CH B) C2H C) C3H D) C2H
  2. What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ Na + ___ H2O → ___ NaOH + ___ H A) 1 B) 2 C) 3 D) 4
  3. Balance the following equation using the smallest set of whole numbers, then add together the coefficients. Don’t forget to count coefficients of one. ___ SF4 + ___ H2O → ____H2SO3 + ___ HF A) 4 B) 9 C) 6 D) 7
  4. When 22.0 g NaCl and 21.0 g H2SO4 are mixed and react according to the equation below, which is the limiting reagent? 2NaCl + H2SO4 → Na2SO4 + 2HCl A) NaCl B) H2SO C) Na2SO D) No reagent is limiting
  5. What is the theoretical yield of aluminum that can be produced by reaction of 60.0 g of aluminum oxide with 30.0 g of carbon according to the following chemical equation? Al2O3 + 3C → 2Al + 3CO A) 30.0 g B) 31.8 g C) 101.2 g D) 45.9 g