chemistry test three
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
