Question 1
pts
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Scientific Calculator
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Periodic Table
Equation Table
Show the calculation of the molecular weight for the following two compounds, reporting
your answer to 2 places after the decimal.
1. Ca3(PO4)2
,2. C9H8NO4Cl
Your Answer:
1. 3(40.08)+2(30.97+4(16))=310.18 g/mol Ca 3(PO4)2
2. 9(12.01)+8(1.008)+14.01+4(16)+35.45 = 229.61 g/mol C 9H8NO4Cl
1. 3Ca + 2P + 8O = 310.18
2. 9C + 8H + N + 4O + Cl = 229.61
Question 2
pts
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Scientific Calculator
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,Periodic Table
Equation Table
Show the calculation of the number of moles in the given amount of the following 2
substances.
Report your answer to 3 significant figures.
1. 12.0 grams of Ca3(PO4)2
2. 15.0 grams of C9H8NO4Cl
Your Answer:
1. 12 g x (1mol/310.18g) = .0387 mol Ca 3(PO4)2
2. 15 g x (1 mol/229.61g) = .063 mol C9H8NO4Cl
1. Moles = grams / molecular weight = 12..18 = 0.0387 mole
, 2. Moles = grams / molecular weight = 15..61 = 0.0653 mole
#2 needs 1 more SF
Question 3
pts
You may find the following resources helpful:
Scientific Calculator
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Periodic Table
Equation Table
Show the calculation of the number of grams in the given amount of the following 2
substances.
Report your answer to 1 place after the decimal.
pts
You may find the following resources helpful:
Scientific Calculator
Links to an external site.
Periodic Table
Equation Table
Show the calculation of the molecular weight for the following two compounds, reporting
your answer to 2 places after the decimal.
1. Ca3(PO4)2
,2. C9H8NO4Cl
Your Answer:
1. 3(40.08)+2(30.97+4(16))=310.18 g/mol Ca 3(PO4)2
2. 9(12.01)+8(1.008)+14.01+4(16)+35.45 = 229.61 g/mol C 9H8NO4Cl
1. 3Ca + 2P + 8O = 310.18
2. 9C + 8H + N + 4O + Cl = 229.61
Question 2
pts
You may find the following resources helpful:
Scientific Calculator
Links to an external site.
,Periodic Table
Equation Table
Show the calculation of the number of moles in the given amount of the following 2
substances.
Report your answer to 3 significant figures.
1. 12.0 grams of Ca3(PO4)2
2. 15.0 grams of C9H8NO4Cl
Your Answer:
1. 12 g x (1mol/310.18g) = .0387 mol Ca 3(PO4)2
2. 15 g x (1 mol/229.61g) = .063 mol C9H8NO4Cl
1. Moles = grams / molecular weight = 12..18 = 0.0387 mole
, 2. Moles = grams / molecular weight = 15..61 = 0.0653 mole
#2 needs 1 more SF
Question 3
pts
You may find the following resources helpful:
Scientific Calculator
Links to an external site.
Periodic Table
Equation Table
Show the calculation of the number of grams in the given amount of the following 2
substances.
Report your answer to 1 place after the decimal.
