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Chapter 3: Q 35E (page 169)

Question-Determine the percent ammonia (NH3) in Co (NH3)6Cl3 to three significant figures.

Short Answer

Expert verified

The percent ammonia in Co (NH3)6Cl3 is 38.2%.

Step by step solution

01

Determine the mass

Mass of ammonia = 6x17g = 102g

Mass of Co(NH3)6Cl3 = 267g

02

Determine percent of ammonia

Percent ammonia = (mass of ammonia/mass of molecule) x 100

= (102/267) x 100

= 38.2%

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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 number of moles of compound and the number of moles of each type of atom in each of the following:

(a) 25.0 g of propylene, C3H6

(b) 3.06脳10鈭�3 g of the amino acid glycine, C2H5NO2

(c) 25 lb of the herbicide Treflan, C13H16N2O4F (1 lb = 454 g)

(d) 0.125 kg of the insecticide Paris Green, Cu4(AsO3)2(CH3CO2)2

(e) 325 mg of aspirin, C6H4(CO2H) (CO2CH3)

Calculate the molar mass of each of the following compounds:

(a) hydrogen fluoride, HF

(b) ammonia, NH3

(c) nitric acid, HNO3

(d) silver sulfate, Ag2SO4

(e) boric acid, B(OH)3

Question- Dichloroethane, a compound that is often used for dry cleaning, contains carbon, hydrogen, and chlorine. It has a molar mass of 99g/mol. Analysis of a sample shows that it contains 24.3% carbon and 4.1% hydrogen. What is its molecular formula?

A prospector panning for gold in the river collects 15g of pure gold. How many Au atoms are there in this quantity of gold?

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