SMC CHEM 10 - Chapter 6 Worksheet (3 pages)

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Chapter 6 Worksheet



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Chapter 6 Worksheet

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Lecture Notes


Pages:
3
School:
Santa Monica College
Course:
Chem 10 - Introductory General Chemistry
Introductory General Chemistry Documents

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Chemistry 10 Dr Scholefield Chapter 6 Worksheet Homework is not collected or graded but should be worked on seriously every week Mole Quantities Particle Quantities and Mass 1 What is the numeric value of the mole What is this value also known as 1 mole 2 A balloon contains 2 58 x 1024 molecules of methane CH4 How many moles of methane are in this balloon 3 An engagement ring contains 3 97 x 104 moles of gold How many individual gold atoms are in this ring 4 Exactly how is the formula mass of a substance different from its molar mass 5 Calculate the molar masses of each of the following substances don t forget your units a silicon in its natural state b phosphorus pentachloride c lithium sulfite 6 Why does 1 mole of silicon have a different mass from 1 mole of phosphorus pentachloride see 5a and 5b Don t they both consist of the same number of particles 7 What is the mass in grams of 0 121 moles of phosphorus pentachloride 8 A rock contains 3 64 kg of lithium sulfite How many moles of lithium sulfite are in this rock 9 What is the mass in grams of 4 78 x 1024 atoms of silicon 10 Aspartame C14H18N2O5 is an artificial sweetener marketed as Nutra Sweet A packet of Nutra Sweet is found to contain 500 mg of aspartame How many individual molecules of aspartame are in this packet Formulas as Conversion Factors 11 How many individual P atoms are found in 1 76 x 1022 molecules of tetraphosphorus trisulfide 12 How many moles of O are in 0 575 moles of calcium perchlorate 13 How many individual C atoms are found in 308 grams of benzene C6H6 14 What mass in grams of Na is found in 10 84 moles of sodium oxide Percent Composition of Compounds 15 Calculate the mass percent of each element in aluminum bicarbonate Al HCO3 3 16 Arrange the following compounds in order of increasing mass of phosphorus H3PO4 P4O10 and PCl3 17 When 54 grams of a compound containing the elements N and O only is analyzed it is found to contain 40 grams of O What mass of N would be found in a 2 36 gram



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