Calculate the molar mass of each substance
[PDF File]Molar Mass Problems - ChemTeam
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Molar Mass Problems 1. Calculate the mass of 1.000 mole of CaCl2 2. Calculate grams in 3.0000 moles of CO2 3. Calculate number of moles in 32.0 g of CH4 4. Determine mass in grams of 40.0 moles of Na2CO3 5. Calculate moles in 168.0 g of HgS 6. Calculate moles in 510.0 g of Al2S3 7. How many moles are in 27.00 g of H2O 8.
[PDF File]Mole Lab
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1. Find and record the mass of the empty sample container. 2. Find and record the mass of each sample provided. 3. Calculate the molar mass of each substance using the periodic table. Use the formulas for the solid compounds given in the lab background information. 4. Calculate the number of moles and number of particles in each sample.
[PDF File]Chapter 3. Stoichiometry: Mole-Mass Relationships in ...
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•The molar mass (M) of a substance is the mass of one mole of entities (atoms, molecules, or formula units) of the substance. • Molar mass has units of grams per mole (g/mol). Concept 3 . The relations among amount of substance (in moles), mass (in grams), and number of chemical entities
[PDF File]Determination of the Molar Mass of an Unknown Solid by ...
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Because the mass of unknown solute is known (measured on the balance) and the number of moles has been calculated (by Eq. 4 ), you can determine the molar mass of the unknown solute using the equation below. MM solute = m solute n solute (5) You will be working with cyclohexane as your solvent. formula = C 6H 12 MM = 84:160 g/mol ˆ = 0:779 g ...
[PDF File]Solutions Worksheet #1: Molarity Molar Mass of Mass of ...
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2) Calculate the number of moles and the number of grams of solute in each solution: Moles of solute (mol) Molar Mass of solute (g/mol) Mass of solute (g) a 1.0 liter of .5 M NaCl b 500.0 mL of 2.0 M KNO3 c 250.0 mL of .10 M CaCl2 d 2.0 liters of .30 M Na2SO4 3) Compute the mass of solute needed to make 500.0 mL of solution at the indicated ...
[PDF File]Chapter 3 Molar Mass Calculation of Molar Masses
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Sum = molar mass = 18.0152 g H 2O per mole Chapter 3 Calculation of Molar Masses Calculate the molar mass of the following Magnesium nitrate, Mg(NO 3)2 1 Mg = 24.3050 2 N = 2x 14.0067 = 28.0134 6 O = 6 x 15.9994 = 95.9964 Molar mass of Mg(NO 3)2 = 148.3148 g Calcium carbonate, CaCO 3 1 Ca = 40.078 1 C = 12.011 3 O = 3 x 15.9994 Molar mass of ...
[PDF File]How to calculate molar mass of unknown substance
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How to calculate molar mass of unknown substance Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. Each element's contribution is expressed as a percentage of the whole. This step-by-step tutorial will show the method to determine the mass percent composition of a molecule.
[PDF File]Molecular Formula: Example
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Since we know the molar mass of each substance we can also establish the mass relationships: CH 4 + 2O 2 → CO 2 + 2H 2O 1 mole 2 moles 1 mole 2 moles x 16.0 g/mol 32.0 g/mol 44.0 g/mol 18.0 g/mol 16.0 g 64.0 g 44.0 g 36.0 g+ =+ The total mass of products should be the same as the total mass of reactants
[PDF File]Molar Mass by Freezing Point Depression OBJECTIVES ...
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Notice that the freezing point of a substance or a mixture is the temperature at which the solid and liquid phases are in equilibrium at one atm of pressure. The next exercise illustrates how to use the experimentally measured decrease of freezing point, ∆Tf, to calculate the molar mass of an unknown nonvolatile nondissociating solute.
[PDF File]lwtech-learning-lab-science-molar-mass
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The molar mass of a compound tells you the mass of 1 mole of that substance. In other words, it tells you the number of grams per mole of a compound. The units for molar mass are, therefore, grams/mole. To find the molar mass of a compound: 1. Use the chemical formula to determine the number of each type of atom present in the compound. 2.
[PDF File]Example Exercise 9.1 Atomic Mass and Avogadro’s Number
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Molar Mass Calculations. We begin by finding the atomic mass of each element in the periodic table. The molar mass equals the sum of the atomic masses expressed in g/mol. (a) The atomic mass of Ag is 107.87 amu, and the molar mass of silver equals 107.87 g/mol. (b) The sum of the atomic masses for NH. 3 is 14.01 amu + 3(1.01)amu = 17.04 amu ...
[PDF File]Ka and Molar Mass Determination of an Unknown Organic Acid
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Make a second calculation of the molar mass of the acid. To report the molar mass of the acid, take an average of the two molar mass measurements. Report the uncertainty as half of the difference between the two mass measurements (ex. if Trial # 1 gives a mass of 240 g/mol and Trial # 2 gives 256 g/mol the average should be reported as 248 8 g ...
[PDF File]Chapter 3
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The molar mass (M) of a substance is the mass per mole of its entites (atoms, molecules or formula units). For . monatomic elements, the molar mass is the same as the atomic mass in grams per mole. The atomic mass is simply read from the Periodic Table. The molar mass of Ne = 20.18 g/mol. Molar Mass
[PDF File]MOLE PROBLEM SET #1: Avogadro’s Number and Molar Mass
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MOLE PROBLEM SET #1: Avogadro’s Number and Molar Mass 1) REPRESENTATIVE PARTICLES Directions: For each substance below, state the representative particle (atom, ion, molecule, or formula unit). If the RP is a molecule, state the number of atoms that make up the molecule. If the RP is a formula unit, state the
[PDF File]Molar mass (Chapter 2.7 and 2.8) - Cal State LA
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Try to use molar mass when talking about the mass of one mole of a substance. The following terms can be confusing … Atomic mass: the mass in grams of one atom (1.992646 x 10-23 g for 12C). Atomic mass is different than the mass number A (#protons). Atomic weight: often means the mass in grams of one mole, not one atom, of a naturally
[PDF File]Determining Molar Mass of Acid by Titration
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Determining Molar Mass of an Unknown Acid by Titration . Objectives: To learn the technique of titration, and apply it to determine the molar mass of an unknown weak acid by titration with sodium hydroxide . Materials: Three 250-mL Erlenmeyer flasks, one 250mL beaker, a sample bottle, - mL 50-
[PDF File]Chapter 3 Stoichiometry - Chemistry
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Molar Mass The trick: • By definition, this is the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amuʼs) will be the same number as the molar mass (in g/mol)
[PDF File]CHAPTER 10 Study Guide 10 Study Guide - Evaluation 2016
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Calculate the molar mass of each substance. a. H 3PO 4 b. N 2O 3 c. CaCO 3 d. (NH 4) 2SO 4 e. C 4H 9O 2 f. Br 2 54. Calculate the mass of 1.00 mol of each of these substances. a. silicon dioxide (SiO 2) b. diatomic nitrogen (N 2) c. iron(III) hydroxide (Fe(OH) 3) d. copper (Cu) 55. List the steps you would take to calculate the molar mass of ...
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