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Chapter 3: Q.25E (page 129)

Determine which of the following contains the greatest mass of aluminum: 122 g of AlPO4, 266 g of Al2C16, or 225 g of Al2S3.

Short Answer

Expert verified

Greatest mass of Al is in Al2S3 = 81 g.

Step by step solution

01

Determine the number of moles

Given

122 g of AlPO4

266 g of Al2C16

225 g of Al2S3

Molar mass of AlPO4 = 2 x 27 + 16 x 12 = 246 g/mol

Molar mass Al2C16= 27 + 31+ 4 x 16 = 122 g/mol

Molar mass Al2S3= 2 x 27 + 3 x 32 = 150 g/mol

Number of mole of AlPO4 = (122 g) / (122 g/mol) = 1 mol AlPO4

Number of mole of Al2C16 = (266 g)/(246 g/mol) = 1.081 mol of Al2C16

Number of mole of Al2S3 = (225 g)/(150 g/mol) = 1.5 mol of Al2S3

02

Determine the mass

Mass of Al in AlPO4 = 1 mol x 27 g/mol = 27 g

Mass of Al in Al2C16 = 1.081 mol x 54 g/mol = 58.374 g

Mass of Al in Al2S3 = 1.5 mol x 54 g /mol = 81 g

Greatest mass of Al is in Al2S3

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Most popular questions from this chapter

Question: Determine the following to four significant figures-

(a) The percent composition of hydrazoic acid, HN3

(b) The percent composition of TNT, C6H2CH3(NO2)3

(c) The percent of SO42- in Al2(SO4)3

Determine the molecular mass of the following compounds:

(a)

(b)

(c)

(d)

Determine the number of moles of the compound and determine the number of moles of each type of atom in

each of the following:

(a) 2.12 g of potassium bromide, KBr

(b) 0.1488 g of phosphoric acid, H3PO4

(c) 23 kg of calcium carbonate, CaCO3

(d) 78.452 g of aluminum sulfate, Al2(SO4)3

(e) 0.1250 mg of caffeine, C8H10N4O2

47. Determine the molarity for each of the following solutions:

(a) 0.444 mol of CoCl2 in 0.654 L of solution

(b) 98.0 g of phosphoric acid, H3PO4, in 1.00 L of solution

(c) 0.2074 g of calcium hydroxide, Ca(OH)2, in 40.00 mL of solution

(d) 10.5 kg of Na2SO4鈭�10H2O in 18.60 L of solution

(e) 7.0脳10-3 mol of I2 in 100.0 mL of solution

(f) 1.8 脳 104 mg of HCl in 0.075 L of solution

Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2.

(a) Which has the largest number of molecules? Explain why.

(b) Which has the greatest mass? Explain why.
See all solutions

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