chemistry test three

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If a sample of carbon dioxide contains 3.8 moles of oxygen atoms, how many moles of carbon dioxide are in the sample?

1.9

One mole of boron has a mass of ________ g.

10.811

Calculate the molar mass of calcium nitrate.

164.10 g/mol

How many moles of fluorine are in 3.2 moles of xenon hexafluoride?

19.2

If you had an aqueous mixture that contained Ag+, K+, and Pb2+ cations, how many different solids could precipitate if a chloride solution was added?

2

identify the double displacement reactions among the following:

2 and 3 only

One mole of ammonium nitrate contains:

2 moles of nitrogen

How many moles of carbon are in 3.5 moles of calcium carbonate?

3.5

One mole of oxygen gas has a mass of ________ g

32.0

What is the molar mass of aluminum sulfate?

342.2 g/mol

One mole of potassium sulfate contains:

4 moles of oxygen

The mass of one mole of carbon dioxide is ________ g.

44.01

What is the correct value for avogrados number?

6.022x10^23

Calculate the molar mass of ammonium carbonate

96.09 g/mol

Which of the following statements about redox reactions is FALSE?

A reaction can result in either oxidation or reduction, not both.

Identify the oxidation-reduction reactions among the following:

All of 1,2 and 3

One mole of ammonium nitrite contains:

All of A, B and C

Is not a sign of chemical reaction

All of above are

Which of the following is not evidence of a chemical reaction?

All of the above are

Which of the following statements about writing molecular, complete and net ionic equations is FALSE?

All of the statements are true

Compound is insoluble

Aluminum sulfide

A precipitate is expected to be formed when aqueous solution of sodium nitrate is added to an aqueous solution

Barium chloride

You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the largest number of moles?

C

What is the gas produced when hydrochloric acid is reacted with ammonium carbonate?

Carbon dioxide

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

Gas evolution

A reaction which forms a gaseous product?

Gas evolution reaction

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

H+ plus Cl- plus K+ pluse OH- = H2O plus K+ plus Cl-

What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

H+ plus OH- arrow H20

What is the molecular equation for the reaction of hydrochloric acid with potassium hydroxide?

HCl +KOH = H2O + KCl

Which of the following types of compounds will not undergo a gas evolution reaction when acid is added?

Hydroxides

A compound is insoluble

Magnesium phosphate

When water is heated, bubbles form in the water. Is this evidence of a chemical reaction?

No it is a physical change

What type of reaction occurs when a potassium nitrate solution is mixed with barium acetate?

No reaction

Which of the following statements about the mole is FALSE?

One mole of water contains 1/2 mole of oxygen atoms

What type of a reaction occurs when potassium metal reacts with fluorine gas

Oxidation- reduction

You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the smallest number of moles

Pb

All are soluble in water except

PbCl2

Compound is soluble

Potassium carbonate

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution

Precipitation

A reaction which forms a gaseous product is an example of

Precipitation reaction

Which of the following everyday substances does not typically contain an acid?

Soap

Statements about balancing reactions is false?

When coefficients are added the type of compound is changed in chemical reaction

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

acid- base neutralization

Compound is soluble

aluminum sulfate

what type of reaction is the generic equation ? AB= A+B

decomposition

What type of reaction is the generic equation ?AB+CD=AD+CB

double displacement

What type of reaction is the generic equation A + BC = AC + B

single displacement

What type of reaction is the generic equation ? A+ B = AB

synthesis/combination

An aqueous solution is

water with another compound dissolved in it

A redox reaction has occurred __________.

when a substance reacts with elemental oxygen

Methane gas (CH4), on complete combustion in air, produces:

1 and 3 only

In writing chemical equation for a precipitation reaction what abbreviation of the physical state must appear with one of the products?

(S)

In comparing 1 mole of carbon atoms to one mole of magnesium atoms, which statement is true?

The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon.

Before a chemical equation can be written, one must know

The symbols and formulas of all reactants and products


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