Chemical Reactions
What is a substance that increases the rate of a reaction but is not used up?
Catalyst
How many mol of water would I produce if I have unlimited oxygen and 4 mol of hydrogen gas?
2H2 + O2 -> 2H2O
4 mol of water
What is the mole ratio of water to oxygen?
2H2O2 → 2H2O + O2
2:1
What is the excess reagent if I have 0.4 mol of calcium and 0.5 mol of chlorine?
Ca + Cl2 -> CaCl2
Chlorine, Cl2
After the completion of my reaction, I measured 10.5 g of product. However, I expected 11.2 g. What is the percent yield of this reaction?
93.8%
The following is which type of reaction?
Na + KCl -> NaCl + K
Single replacement
Balance the following equation:
Ca + H2O → Ca(OH)2 + H2
1 2 1 1
How many moles of water would be produced if given 4.5 mol of H2O2?
2H2O2 → 2H2O + O2
4.5 mol
Which of the reactants is the limiting reagent in the following equation if I am given 60 g of C2H4 and 50 g of water?
C2H4 + H2O -> CH3CH2OH
C2H4
How many moles of glucose would form if 90 moles of carbon dioxide reacted with unlimited water?
6CO2 + 6 H2O → C6H12O6 + 6 O2
15 mol C6H12O6
What would be the product of a synthesis reaction between copper(I) and sulfur?
Cu2S
What is the likely precipitate of a double replacement reaction between sodium sulfate (Na2SO4) and barium chloride (BaCl2)?
BaSO4
How many grams of AgCl would be produced if 40 g of KCl reacted with an excess amount of AgNO3?
AgNO3(aq) + KCl(aq) → AgCl(s) + KNO3(aq)
77.4 g
How many molecules of oxygen reacted with excess sodium to produce 3 moles of Na2O?
4Na(s) + O2(g) → 2Na2O(s)
9.03 x 1023 molecules O2
What would be the theoretical yield of water in grams if 35 grams of H2O2 decomposed?
2H2O2 → 2H2O + O2
18.54 g H2O
What are the products in a decomposition reaction of 2 moles of aluminum oxide?
4 Al + 3 O2
What is the complete ionic equation when a solution of potassium carbonate (K2CO3) is mixed with a solution of calcium nitrate (Ca(NO3)2)?
2K+(aq) + CO32-(aq) + Ca2+(aq) + 2NO3-(aq) → CaCO3(s) + 2K+(aq) + 2NO3-(aq)
How many liters of carbon dioxide gas would form if 2.5 mol of oxygen gas reacts with excess methane? Assume that the reaction takes place at STP.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
28.0 L CO2
If 15.0 g of nitrogen gas reacts with 15.0 g of hydrogen gas, which would be the limiting reagent?
N2 + 3H2 → 2NH3
N2
1 mol of Na and 1 mol of Cl react to form NaCl. What is the actual yield of table salt in grams if the percent yield of this reaction is 95%?
Na + Cl → NaCl
55.52 g NaCl
Write the balanced combustion reaction of methane (CH4)?
CH4 + 2O2 -> CO2 + 2H2O
What is the net ionic equation when a solution of potassium carbonate (K2CO3) is mixed with a solution of calcium nitrate (Ca(NO3)2)?
CO32-(aq) + Ca2+(aq) → CaCO3(s)
How many grams of carbon dioxide would be produced if 2 moles of C2H4 went through a combustion reaction?
176.04 g
If 15.0 g of nitrogen gas reacts with 15.0 g of hydrogen gas, how many grams of ammonia would be produced?
N2 + 3H2 → 2NH3
18.2 g NH3
If 45 g of H2 reacted with excess oxygen to produce 350 g of water, what would the percent yield be?
2H2 + O2 -> 2H2O
86.4%