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H.W: Calculate the M.Wt. for : Ca(OH), , NaHCO,, MgSO,-7H2O 4

H.W: Calculate the M.Wt. for : Ca(OH), , NaHCO,, MgSO,-7H2O 4

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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No. of mmol = M.Wt (mg/mmol) Example : How many moles and millimoles of benzoic acid contained in 2.00 g of the pure acid? Solution: If we use HBz to represent benzoic acid, we can write mass of 122.1g. amount of HBz = ( 2.00 g / 122.1 g/mol )= o.0164 mol HBz. To obtain the number of millimoles, we divide by the millimolar m ount HBz = ( 2.00g / o.1221 g/mmol )= 16.4 mmol HBz. H.W.: 1. Calculate the number of grams in one mole of CaSO7H2O ? (Atomic weight Ca=40 ,S=32 ,0=16 ,H=1 ). 2. Calculate the number of moles in 500 mg Na,SO,?. (MW of Na,SO, =293.8 mg/mmol). Dr. Marwa Nizar AL-Hadbaa University College 2. Molecular Weight (M.wt): of a substa of the atomic weights (AW) of the ele molecular, each taken the number of tim Оссurs. Example: Calculate the M.Wt. for : CH3COOH = 2C + 4H + 20 = 2X12 + 4x1 + 2X16 = 60 g. H.W: Calculate the M.Wt. for: Ca(OH), , NaHCO,, MgSO,7H2O 3 4° Dr. Marwa Nizar AL-Hadbaa University College
Transcribed Image Text:No. of mmol = M.Wt (mg/mmol) Example : How many moles and millimoles of benzoic acid contained in 2.00 g of the pure acid? Solution: If we use HBz to represent benzoic acid, we can write mass of 122.1g. amount of HBz = ( 2.00 g / 122.1 g/mol )= o.0164 mol HBz. To obtain the number of millimoles, we divide by the millimolar m ount HBz = ( 2.00g / o.1221 g/mmol )= 16.4 mmol HBz. H.W.: 1. Calculate the number of grams in one mole of CaSO7H2O ? (Atomic weight Ca=40 ,S=32 ,0=16 ,H=1 ). 2. Calculate the number of moles in 500 mg Na,SO,?. (MW of Na,SO, =293.8 mg/mmol). Dr. Marwa Nizar AL-Hadbaa University College 2. Molecular Weight (M.wt): of a substa of the atomic weights (AW) of the ele molecular, each taken the number of tim Оссurs. Example: Calculate the M.Wt. for : CH3COOH = 2C + 4H + 20 = 2X12 + 4x1 + 2X16 = 60 g. H.W: Calculate the M.Wt. for: Ca(OH), , NaHCO,, MgSO,7H2O 3 4° Dr. Marwa Nizar AL-Hadbaa University College
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