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Stoichiometry
Test Description: Review game
Instructions: Answer all questions to get your test result.
1) A limiting reactant determines
A
the theoretical yield
B
the percent yield
C
temperature
D
how many moles of oxygen
2) How many moles of water can be made from 2 moles of O2 in the following reaction. Oxygen gas and Hydrogen gas to form water. (don't forget to balance your equation)
A
4 moles of water
B
3 moles of water
C
1 mole of water
D
2 moles of water
3) If given grams of reactant 1 what is the process of finding out how much product can be produced?
A
grams reactant 1 - grams reactant 2 - moles reactant 2 - moles of product
B
grams reactant 1 - moles reactant 1 - moles product - grams of product
C
moles of reactant to moles of excess reactant to moles of product
D
grams product - grams reactant 2 - grams reactant 1
4) What is the process of finding percent yield?
A
actual yield - theoretical yield * 100
B
theoretical yield/actual yield *100
C
theoretical yield*actual yield/100
D
actual yield/theoretical yield *100
5) The absolute most product that can be produced in a given reaction is known as the theoretical yield. Which number does this come from?
A
Limiting reactant- the smaller number
B
Excess reactant- the smaller number
C
Limiting reactant- the larger number
D
Excess reactant- the larger number
6) How do you convert from moles of reactant to moles of product?
A
molar mass
B
molar mass over molar mass
C
mass/moles
D
mole to mole ratio
7) Ms. Golden's favorite topic to teach in chemistry is
A
Chemical reactions
B
Moles
C
Gas Laws
D
bonding
8) the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers describes WHICH topic in Chemistry?
A
chemical equations
B
Stoichiometry
C
Avogadro's number
D
moles
9) What is a reason to have a lower actual yield than your theoretical yield?
A
No substances are ever pure, therefore actual yield is always lower
B
The actual yield is always higher than the theoretical yield
C
It is impossible to get 100% yield, because too many things happen in the lab
D
Laboratory settings are not perfect. Mistakes happen with transfer of chemicals and with calculations and/or rounding
10) I did all of my calculations, my lab, and my percent yield was 245%. What happened?
A
I made a mistake
B
My chemical equation was balanced.
C
I used the wrong chemicals
D
I am really good at chemistry
*select an answer for all questions
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