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Determine the number of moles and the mass requested for each reaction in [link] .
(a) 0.0686 mol Mg, 1.67 g Mg; (b) 2.701 10 −3 mol O 2 , 0.08644 g O 2 ; (c) 6.43 mol MgCO 3 , 542 g MgCO 3 (d) 713 mol H 2 O, 12.8 kg H 2 O; (e) 16.31 mol BaO 2 , 2762 g BaO 2 ; (f) 0.207 mol C 2 H 4 , 5.81 g C 2 H 4
H 2 is produced by the reaction of 118.5 mL of a 0.8775-M solution of H 3 PO 4 according to the following equation:
(a) Outline the steps necessary to determine the number of moles and mass of H 2 .
(b) Perform the calculations outlined.
Gallium chloride is formed by the reaction of 2.6 L of a 1.44 M solution of HCl according to the following equation:
(a) Outline the steps necessary to determine the number of moles and mass of gallium chloride.
(b) Perform the calculations outlined.
(a) (b) 1.25 mol GaCl 3 , 2.2 10 2 g GaCl 3
I 2 is produced by the reaction of 0.4235 mol of CuCl 2 according to the following equation:
(a) How many molecules of I 2 are produced?
(b) What mass of I 2 is produced?
Silver is often extracted from ores such as K[Ag(CN)
2 ] and then recovered by the reaction
(a) How many molecules of Zn(CN) 2 are produced by the reaction of 35.27 g of K[Ag(CN) 2 ]?
(b) What mass of Zn(CN) 2 is produced?
(a) 5.337 10 22 molecules; (b) 10.41 g Zn(CN) 2
What mass of silver oxide, Ag
2 O, is required to produce 25.0 g of silver sulfadiazine, AgC
10 H
9 N
4 SO
2 , from the reaction of silver oxide and sulfadiazine?
Carborundum is silicon carbide, SiC, a very hard material used as an abrasive on sandpaper and in other applications. It is prepared by the reaction of pure sand, SiO 2 , with carbon at high temperature. Carbon monoxide, CO, is the other product of this reaction. Write the balanced equation for the reaction, and calculate how much SiO 2 is required to produce 3.00 kg of SiC.
4.50 kg SiO 2
Automotive air bags inflate when a sample of sodium azide, NaN
3 , is very rapidly decomposed.
What mass of sodium azide is required to produce 2.6 ft
3 (73.6 L) of nitrogen gas with a density of 1.25 g/L?
Urea, CO(NH
2 )
2 , is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. What is the maximum mass of urea that can be manufactured from the CO
2 produced by combustion of
of carbon followed by the reaction?
5.00 10 3 kg
In an accident, a solution containing 2.5 kg of nitric acid was spilled. Two kilograms of Na 2 CO 3 was quickly spread on the area and CO 2 was released by the reaction. Was sufficient Na 2 CO 3 used to neutralize all of the acid?
A compact car gets 37.5 miles per gallon on the highway. If gasoline contains 84.2% carbon by mass and has a density of 0.8205 g/mL, determine the mass of carbon dioxide produced during a 500-mile trip (3.785 liters per gallon).
1.28 10 5 g CO 2
What volume of 0.750 M hydrochloric acid solution can be prepared from the HCl produced by the reaction of 25.0 g of NaCl with excess sulfuric acid?
What volume of a 0.2089
M KI solution contains enough KI to react exactly with the Cu(NO
3 )
2 in 43.88 mL of a 0.3842
M solution of Cu(NO
3 )
2 ?
161.40 mL KI solution
A mordant is a substance that combines with a dye to produce a stable fixed color in a dyed fabric. Calcium acetate is used as a mordant. It is prepared by the reaction of acetic acid with calcium hydroxide.
What mass of Ca(OH) 2 is required to react with the acetic acid in 25.0 mL of a solution having a density of 1.065 g/mL and containing 58.0% acetic acid by mass?
The toxic pigment called white lead, Pb
3 (OH)
2 (CO
3 )
2 , has been replaced in white paints by rutile, TiO
2 . How much rutile (g) can be prepared from 379 g of an ore that contains 88.3% ilmenite (FeTiO
3 ) by mass?
176 g TiO 2
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