Chem quizzes

0.04500ft3 to cm3.

0.04500ft3 = 1274 cm3

0.0650mi to m,

0.0650mi = 105 m

0.550in/ms to km/hr,

0.550in/ms = 50.3 km/hr

1.92$/gal to dollars per liter,

1.92$/gal = 0.507 $/L

23.50gal/min to L/s,

23.50gal/min = 1.483 L/s

AgNO3(aq)+Na2SO4(aq)→Ag2SO4(s)+NaNO3(aq)

2AgNO3(aq)+Na2SO4(aq)→Ag2SO4(s)+2NaNO3(aq)

Al(OH)3(s)+H2SO4(aq)→Al2(SO4)3(aq)+H2O(l)

2Al(OH)3(s)+3H2SO4(aq)→Al2(SO4)3(aq)+6H2O(l)

C3H6(g)+O2(g)→CO2(g)+H2O(g)

2C3H6(g)+9O2(g)→6CO2(g)+6H2O(g) combustion

C5H10O2(l)+O2(g)→CO2(g)+H2O(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

2C5H10O2(l)+13O2(g)→10CO2(g)+10H2O(g)

CO(g)+O2(g)→CO2(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

2CO(g)+O2(g)→2CO2(g)

Fe(OH)3(s)+H2SO4(aq)→Fe2(SO4)3(aq)+H2O(l) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

2Fe(OH)3(s)+3H2SO4(aq)→Fe2(SO4)3(aq)+6H2O(l)

When solid potassium chlorate is heated, it decomposes to form solid potassium chloride and oxygen gas.

2KClO3(s)→2KCl(s)+3O2(g)

NH4NO3(s)→N2(g)+O2(g)+H2O(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

2NH4NO3(s)→2N2(g)+O2(g)+4H2O(g)

Based on this reaction, how many moles of CO can be obtained starting with 3.0mol CH4?

3 mols

When hydrogen sulfide gas is passed over solid hot iron (III) hydroxide, the resultant reaction produces solid iron (III) sulfide and gaseous water.

3H2S(g)+2Fe(OH)3(s)→Fe2S3(s)+6H2O(g)

C2H5NH2(g)+O2(g)→CO2(g)+H2O(g)+N2(g)

4C2H5NH2(g)+15O2(g)→8CO2(g)+14H2O(g)+2N2(g)

Nitrogen monoxide and oxygen react to form nitrogen dioxide. How many NO2 molecules would form as products if the reaction had a percent yield of 75%?

6

An electric car is capable of going 225 km on a single charge. With a full charge to start, how many additional charges will it need to travel from Seattle, Washington, to San Diego, California, a distance of 1257 mi?

8 charges

Based on this reaction, how many moles of H2 can be obtained starting with 3.0mol CH4?

9 mols

9.50 days to s,

9.50 days = 8.21×105 s

If the actual yield of bromobenzene was 65.6g , what was the percentage yield?

96.0 %

Write the chemical formula for aluminum hydroxide.

Al(OH)3

Aluminum sulfide reacts with water to form aluminum hydroxide and hydrogen sulfide.

Al2S3(s)+6H2O(l)→2Al(OH)3(s)+3H2S(g)

Al4C3(s)+H2O(l)→Al(OH)3(s)+CH4(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

Al4C3(s)+12H2O(l)→4Al(OH)3(s)+3CH4(g)

barium bromate

Ba(BrO3)2

If the compound has a molar mass of 156 g/mol, what is its molecular formula?

C10H20O

Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1206−mg sample of menthol is combusted, producing 0.3395mg of CO2 and 0.1391mg of H2O. What is the empirical formula for menthol?

C10H20O

Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H, and 15.51% O by mass, and has a molar mass of 206 g/mol.

C13H18O2,C13H18O2

C5H6O(l)+O2(g)→CO2(g)+H2O(g)

C5H6O(l)+6O2(g)→5CO2(g)+3H2O(g) combustion

Combustion analysis of toluene, a common organic solvent, gives 7.03mg of CO2 and 1.64mg of H2O. If the compound contains only carbon and hydrogen, what is its empirical formula?

C7H8

Epinephrine (adrenaline), a hormone secreted into the bloodstream in times of danger or stress, contains 59.0% C, 7.1% H, 26.2% O, and 7.7% N by mass; its MW is about 180 amu.

C9H13O3N,C9H13O3N

What is the empirical formula of the hydrocarbon?

CH4

CH4(g)+Cl2(g)→CCl4(l)+HCl(g) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

CH4(g)+4Cl2(g)→CCl4(l)+4HCl(g)

Calcium hypochlorite is used in some bleaching solutions.

Ca(ClO)2

Ca3P2(s)+H2O(l)→Ca(OH)2(aq)+PH3(g)

Ca3P2(s)+6H2O(l)→3Ca(OH)2(aq)+2PH3(g)

Solid calcium carbide, CaC2, reacts with water to form an aqueous solution of calcium hydroxide and acetylene gas, C2H2.

CaC2(s)+2H2O(l)→Ca(OH)2(aq)+C2H2(g)

Cadaverine, a foul smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H, and 27.40% N by mass; its molar mass is 102.2 g/mol.

Cadaverine, a foul smelling substance produced by the action of bacteria on meat, contains 58.55% C, 13.81% H, and 27.40% N by mass; its molar mass is 102.2 g/mol.

When cadmium sulfide is treated with sulfuric acid, fumes of hydrogen sulfide are given off

CdS,H2SO4,H2S

cobalt(II) hydrogen carbonate

Co(HCO3)2

chromium(III) acetate

Cr(C2H3O2)3

Write the chemical formula for copper(I) oxide.

Cu2O

iron(II) perchlorate

Fe(ClO4)2

Write the chemical formula for iron(III) carbonate.

Fe2(CO3)3

sulfurous acid

H2SO3

Hydrogen cyanide is a very poisonous gas.

HCN

hydrogen cyanide,

HCN

hypochlorous acid,

HClO

chloric acid

HClO3

Perchloric acid reacts with cadmium to form cadmium( II) perchlorate.

HClO4,Cd,Cd(ClO4)2

On treatment with hydrofluoric acid, silicon dioxide forms silicon tetrafluoride and water.

HF,SiO2,SiF4,H2O

hydroiodic acid

HI

iodic acid

HIO3

nitrous acid

HNO2

Write the chemical formula for mercury(II) bromide.

HgBr2

potassium dichromate

K2Cr2O7

K2O(s)+H2O(l)→KOH(aq)

K2O(s)+H2O(l)→2KOH(aq) combination

Write the chemical formula for potassium sulfate.

K2SO4

Magnesium hydroxide is used as a cathartic.

Mg(OH)2

Mg3N2(s)+H2SO4(aq)→MgSO4(aq)+(NH4)2SO4(aq)

Mg3N2(s)+4H2SO4(aq)→3MgSO4(aq)+(NH4)2SO4(aq)

Number of O atoms in 4.25×10−3mol Al(NO3)3

N = 2.30×1022 O atoms

Number of N atoms in 0.400mol NH3

N = 2.41×1023 atoms

Number of molecules in 6×10−6mol CH3CH2OH.

N = 3.613×1018 molecules

Number of molecules in 8.467×10−2mol C6H6

N = 5.099×1022 molecules

N2(g)+H2(g)→NH3(g)

N2(g)+3H2(g)→2NH3(g) combination

dinitrogen tetroxide

N2O4

N2O5(g)+H2O(l)→HNO3(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

N2O5(g)+H2O(l)→2HNO3(aq)

NH4NO3(s)→N2O(g)+H2O(l)

NH4NO3(s)→N2O(g)+2H2O(l) decomposition

If the blue spheres represent N atoms and the red ones represent O atoms, what was the empirical formula of the original compound?

NO2

sodium phosphate

Na3PO4

Write the chemical formula for sodium hypobromite.

NaBrO

Sodium hydrogen carbonate is used as a deodorant.

NaHCO3

Which reagent is the limiting reactant when 2.82mol NaOH and 1.50mol CO2 are allowed to react?

NaOH

tetraphosphorus hexasulfide.

P4S6

When liquid phosphorus trichloride is added to water, it reacts to form aqueous phosphorous acid, H3PO3(aq), and aqueous hydrochloric acid.

PCl3(l)+3H2O(l)→H3PO3(aq)+3HCl(aq)

The substance phosphorus tri-hydride, commonly called phosphine, is a toxic gas

PH3

Sulfur dioxide reacts with water to form sulfurous acid.

SO2,H2O,H2SO3

Tin(II) fluoride has been used as a fluoride additive in toothpastes.

SnF2

TiCl4(l)+H2O(l)→TiO2(s)+HCl(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

TiCl4(l)+2H2O(l)→TiO2(s)+4HCl(aq)

How many liters of wine can be held in a wine barrel whose capacity is 36gal ?

V = 1.4×102 L

A pound of coffee beans yields 30 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans?

V = 16 mL

In March 1989 the Exxon Valdez ran aground and spilled 240,000 barrels of crude petroleum off the coast of Alaska. One barrel of petroleum is equal to 42 gal. How many liters of petroleum were spilled?

V = 3.8×107 L

What is the engine piston displacement in liters of an engine whose displacement is listed as 420in3 ?

V = 6.9 L

Vanadium(III) bromide is a colored solid.

VBr3

Write the chemical formula for zinc nitrate.

Zn(NO3)2

zinc nitrate

Zn(NO3)2

Solid zinc metal reacts with sulfuric acid to form hydrogen gas and an aqueous solution of zinc (II) sulfate.

Zn(s)+H2SO4(aq)→H2(g)+ZnSO4(aq)

Zinc carbonate can be heated to form zinc oxide and carbon dioxide.

ZnCO3,ZnO,CO2

CH3COOH

acetic acid

Hydrogen sulfide is an impurity in natural gas that must be removed. One common removal method is called the Claus process, which relies on the reaction: 8H2S(g)+4O2(g)→S8(l)+8H2O(g) Under optimal conditions the Claus process gives 98% yield of S8 from H2S. If you started with 40.0 grams of H2S and 45.0 grams of O2, how many grams of S8 would be produced, assuming 98% yield?

actual yield = 37 g

(NH4)2SO4

ammonium sulfate

(NH4)2SO3

ammonium sulfite

HBrO3

bromic acid

Ca(C2H3O2)2

calcium acetate

CaSO3

calcium sulfite

H2CO3

carbonic acid

Cr2(CO3)3

chromium(III) carbonate

Cr(NO3)3

chromium(III) nitrate

CoS

cobalt(II) sulfide

Cu(OH)2

copper(II) hydroxide

N2O,

dinitrogen monoxide

N2O5,

dinitrogen pentoxide

N2O4

dinitrogen tetroxide

If the copper is drawn into wire whose diameter is 8.50mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm3.

h = 440 ft

HBr

hydrobromic acid

IF5

iodine pentafluoride

Fe(OH)2

iron(II) hydroxide

Fe2(CO3)3

iron(III) carbonate

FeCl3

iron(III) chloride

Li2O

lithium oxide

Mass, in grams, of 2.50×10−2mol of CdS.

m = 3.61 g

The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 195lb person.

m = 5×102 mg

Octane has a density of 0.692 g/mL at 20 ∘C. How many grams of O2 are required to burn 14.0gal of C8H18

m = 1.28×105 g

How many grams of sodium sulfide are formed if 1.20g of hydrogen sulfide is bubbled into a solution containing 1.60g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0% yield?

m = 1.47 g

How many grams of aluminum hydroxide are obtained from 15.2g of aluminum sulfide?

m = 15.8 g

How many grams of O2 are needed to burn 13.0g of C8H18?

m = 45.5 g

What is the theoretical yield of bromobenzene in this reaction when 34.0g of benzene reacts with 73.7g of bromine?

m = 68.3 g

If an automobile is able to travel 400 km on 47.1L of gasoline, what is the gas mileage in miles per gallon?

mileage = 20 mi/gal

Number of moles of NH4Cl in 106.6g of this substance.

n = 1.99 mol

How many moles of the excess reactant remain after the completion of the reaction?

n = 0.09 mol

How many moles of Na2CO3 can be produced?

n = 1.41 mol

How many moles of O2 are needed to burn 1.45mol of C8H18?

n = 18.1 mol

NO2

nitrogen dioxide

NO

nitrogen monoxide

HClO4

perchloric acid

H3PO4

phosphoric acid

K2CrO4

potassium chromate

KCN

potassium cyanide

KMnO4

potassium permanganate

Ag2Cr2O7

silver dichromate

The fizz produced when an Alka-Seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7): 3NaHCO3(aq)+H3C6H5O7(aq)→3CO2(g)+3H2O(l)+Na3C6H5O7(aq) In a certain experiment 1.00g of sodium bicarbonate and 1.00g of citric acid are allowed to react. Which is the limiting reactant? How many grams of carbon dioxide form? How many grams of the excess reactant remain after the limiting reactant is completely consumed?

sodium bicarbonate m = 0.524g m = 0.24 g

NaBrO2

sodium bromite

NaH2PO4

sodium dihydrogen phosphate

NaClO

sodium hypochlorite

Moles of Zn(NO3)2 in 121.50g of this substance.

ssdsad

Sr(OH)2

strontium hydroxide

SF6

sulfur hexafluoride

If a migrating loon flies at an average speed of 15m/s , what is its average speed in mi/hr?

v = 34 mi/hr

XeO3

xenon trioxide

Mass, in grams, of 0.195mol sucrose (C12H22O11).

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