Balanced equation Study guides, Class notes & Summaries

1. A solution is prepared by dissolving 50 g of KCl (74.6 g/mol) to a volume of 1 L. What is the molarity of this solution? 2. You prepare a solution by dissolving 20 g of NaCl to a volume of 350 mL in water. What is the mass/volume % concentration of this solution? 3. When the following reaction goes in the forward direction, what is the base? 4. You are preparing a buffered solution. So far, your solution contains H2PO4- ions, what would you add to this solution to prepare your buffer sy...

Chapter 03 Stoichiometry: Ratios of Combination 1. Calculate the molecular mass of tetraphosphorus decaoxide, P4O10, a corrosive substance which can be used as a drying agent. A. 469.73 amu B. 283.88 amu C. 190.97 amu D. 139.88 amu E. 94.97 amu 2. Calculate the formula mass of rubidium carbonate, Rb2CO3. A. 340.43 amu B. 255.00 amu C. 230.95 amu D. 145.47 amu E. 113.48 amu 3. Calculate the formula mass of (NH4)3AsO4. A. 417.80 amu B. 193.05 amu C. 165.02 amu D. 156.96 amu E. 108.96 a...

Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: O2 + Mg ⟶ 2 MgO If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form? A. 8 Moles B. 2 Moles C. 4 Moles D. 1 Mole E. Not Enough Info correct answer: C Which of the following is TRUE? A. Stoichiometry allows prediction of how much of the reactants are necessary to form a given amount of product. B. ...

Chemistry 101 Final Ivy Tech Exam Questions with 100% Verified Correct Answers Graded A+ Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: O2 + Mg ⟶ 2 MgO If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form? A. 8 Moles B. 2 Moles C. 4 Moles D. 1 Mole E. Not Enough Info - Correct Answer C Which of the following is TRUE? A. Stoichiometry allows predic...

Introduction to Chemistry 5th Edition by Rich Bauer – Test Bank Description Introduction to Chemistry 5th Edition by Rich Bauer – Test Bank Sample Questions Instant Download With Answer s Introduction to Chemistry, 5e (Bauer) Chapter 3 Chemical Compounds 1) The figure shows all but which of the following? 1. A) two elements and a compound 2. B) a chemical reaction 3. C) one mixture and one pure substance 4. D) three compounds Answer: D Difficulty: 1 Easy Topic: Study of Chemistry Bloom’s: ...

Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT OF 100) Portage learning (Latest Update) MODULE 1 EXAM Question 1 Click this link to access the Periodic Table. This may be helpful throughout the exam. 1. Convert 845.3 to exponential form and explain your answer. 2. Convert 3.21 x 10-5 to ordinary form and explain your answer. 1. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places = 8.453 x 102 2. Convert 3.21 x 10-5 = negative exponent = smalle...

The Chemistry of Respiration Read the following text. Then answer the questions below based on the text and your knowledge of chemistry. RESPIRATION IN YEAST Yeast is a microscopic, single-celled fungus that we rely on for producing many types of food, including some breads. Yeast cells are remarkably similar to human cells in how they acquire energy to maintain their cellular functions. The cells of both yeast and humans, like those of most organisms, have the ability to metabolize glu...

AQA GCSE Separate Science Chemistry – Paper 1 Higher Tier Predicted Paper 2023 With marking scheme Name …………………………………………………………………… Date ………………… 1 hour 45 minutes allowed. You may use a calculator and an AQA periodic table. Grade boundaries These are VERY rough guesses! Getting a 7 on this paper does not guarantee you the same mark in the exam. • 9 70% • 8 60% • 7 50% • 6 45% • 5 35% ...

AQA GCSE BIOLOGY 8461/1H Paper 1 Higher Tier Question Paper + Mark scheme [MERGED] June 2022 *JUNH01* IB/M/Jun22/E20 8461/1H For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions in th...

Sample Chemistry Placement Exam Questions with Certified Answers Answer: Oxygen Aluminum forms a +3 ion. In order for the formula unit Al2X3 to be electrically neutral, the element X must form a -2 ion. Nonmetals in the oxygen column do this. Of these elements, only oxygen is a diatomic gas. Aluminum reacts with element X to form a compound with the formula A2X3. Element X exists as diatomic molecules, X2, in the gaseous state at normal temperature and pressure. Element X must be? A...