1. How many moles of NaOH (FW = 40g/mol) are there in 2.0 grams NaOH? 2. How many grams of Na2CO3 (FW=106g/mo10 are there in 0.50 moles Na2CO3? 3. How much does 6.02 x 1023 molecules of CO2 (FW = 44g/mol) weigh? 4. Calculate the formula weight of aluminum phosphate. 5. What is the percentage composition of the elements present in sodium carbonate? 6. Determine the empirical formula of the compound containing 87.5% nitrogen and 12.5% H by mass. 7. What is the molecular formula of the compound if its empirical formula is HCO2 and its molecular weight is 90.0 almu?
1. How many moles of NaOH (FW = 40g/mol) are there in 2.0 grams NaOH? 2. How many grams of Na2CO3 (FW=106g/mo10 are there in 0.50 moles Na2CO3? 3. How much does 6.02 x 1023 molecules of CO2 (FW = 44g/mol) weigh? 4. Calculate the formula weight of aluminum phosphate. 5. What is the percentage composition of the elements present in sodium carbonate? 6. Determine the empirical formula of the compound containing 87.5% nitrogen and 12.5% H by mass. 7. What is the molecular formula of the compound if its empirical formula is HCO2 and its molecular weight is 90.0 almu?
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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Transcribed Image Text:1. How many moles of NaOH (FW = 40g/mol) are there in 2.0 grams NaOH?
2. How many grams of Na2CO3 (FW=106g/mo10 are there in 0.50 moles Na2CO3?
3. How much does 6.02 x 1023 molecules of CO2 (FW = 44g/mol) weigh?
4. Calculate the formula weight of aluminum phosphate.
5. What is the percentage composition of the elements present in sodium carbonate?
6. Determine the empirical formula of the compound containing 87.5% nitrogen and 12.5%
H by mass.
7. What is the molecular formula of the compound if its empirical formula is HCO2 and its
molecular weight is 90.0 almu?
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