Molar conversions - Study guides, Class notes & Summaries

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...

Define: Avogadro's number 6.023x 10^23 One mole of a pure substance Define: Empirical Formula elements combined in a compound with subscripts showing the smallest whole-number mole ratio Define: Molecular formula a formula showing the types and numbers of atoms combined in a single molecule of a molecular compound Define: Formula mass the sum of the average atomic masses of all the atoms represented in the formula of any molecule, formula unit, or ion Define: Mo...

Chemistry Conversions Exam Questions Correctly Answered. Converting moles to grams - CORRECT ANSWER There are three steps to converting moles of a substance to grams: Determine how many moles are given in the problem. Calculate the molar mass of the substance. Multiply step one by step two. Converting grams to moles - CORRECT ANSWER Using a calculator, divide the number of grams by the molar mass. The result is the number of moles in your element or compound. For example, imagine you ...

The Mole Chemistry Study Guide Exam Questions Correctly Answered. why chemists use the mol - CORRECT ANSWER Chemists use the mole because it is a convenient way of knowing how many representative particles are in a sample. State the mathematical relationship between Avogadro's number and 1 mol. - CORRECT ANSWER One mole contains 6.02 10 particles List the conversion factors used to convert between particles and moles. - CORRECT ANSWER 6.02 1023 representative particles ____ 1 mol , 6...

● Stoichiometry is the use of quantitative relationships between substances that are involved in chemical reactions which determine the amounts of the reactants or the products (Bauer, Birk, & Mar ks, 2019). Stoichiometry - the process of determining the amounts of substances in a chemical reaction (Bauer, Birk, & Marks, 2019). ● It is used to relate the reactants and products by using calculations and balanced equations (Bauer, Birk, & Marks, 2019). ● By knowing the amount of a reactant o...

Chapter 1 Ana. Chem. - A discipline that uses methods, instruments, and strategies to get info on the nature of a component in a sample - Qualitative [is it in the sample?] - Quantitative [how much is in the sample?] - Basis: properties of chem forms - Chem species [ atoms, molecules, ions, analyte] o CH4, CO2, CO3 – species of Carbon Analytical Approach - Define the problem - Obtain sample - Design the experimental method • Establish design criteria [accuracy, cost, speed] • Ev...

Chapter 1 Ana. Chem. - A discipline that uses methods, instruments, and strategies to get info on the nature of a component in a sample - Qualitative [is it in the sample?] - Quantitative [how much is in the sample?] - Basis: properties of chem forms - Chem species [ atoms, molecules, ions, analyte] o CH4, CO2, CO3 – species of Carbon Analytical Approach - Define the problem - Obtain sample - Design the experimental method • Establish design criteria [accuracy, cost, speed] • Ev...

How many kilograms are in 143 grams? Using KHDBDCM Starting with Grams (g) – base unit. Moving to kilograms (kg); move the decimal three spaces to the right 143 g – 0.143 g Using conversion factors KNOW that kilo = 1000 base 143 g x (1 kg/1000g ) = 0.143 kg 2.) CONVERSIONS WITH ENGLISH UNITS How many milliliters are in 13.5 oz? MUST USE CONVERSION FACTORS (oz, lb, feet, inches…) Always start with what you know…. Figure out where to go 13.5 oz ? mL 13.5 oz 1 cup 1 pt 1 qt ...

CHEM120 Week 3 Virtual Lab: Stoichiometric Calculations Part I and Part II – Download To Score An A+ OL Lab 5: Stoichiometric calculations Identify an unknown compound using gravimetric analysis Learning Objectives: • Explain the relationship between mass, molecular weight, and numbers of atoms or molecules and perform calculations deriving these quantities from one another • Perform mass-to-mass stoichiometric calculations via conversions to moles • Identify the limiting and excess reag...

CHEM120 Week 3 Concepts: Chemical Reactions and Calculations – Download To Score An A+ OL Lab 3: Stoichiometry: Avogadro’s number and molecular calculations / Solution Preparation: From salt to solution Learning Objectives: • Explain the relationship between mass, molecular weight, and numbers of atoms or molecules and perform calculations deriving these quantities from one another • Perform mass-to-mass stoichiometric calculations via conversions to moles • Identify the limiting and e...