Stoichiometry Question Preview (ID: 58861)
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A limiting reactant determines
a) the theoretical yield
b) the percent yield
c) how many moles of oxygen
d) temperature
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) 1 mole of water
b) 2 moles of water
c) 3 moles of water
d) 4 moles of water
If given grams of reactant 1 what is the process of finding out how much product can be produced?
a) grams product - grams reactant 2 - grams reactant 1
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 reactant 1 - grams reactant 2 - moles reactant 2 - moles of product
What is the process of finding percent yield?
a) theoretical yield*actual yield/100
b) theoretical yield/actual yield *100
c) actual yield/theoretical yield *100
d) actual yield - theoretical yield * 100
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) Limiting reactant- the larger number
c) Excess reactant- the smaller number
d) Excess reactant- the larger number
How do you convert from moles of reactant to moles of product?
a) mole to mole ratio
b) molar mass
c) mass/moles
d) molar mass over molar mass
Ms. Golden's favorite topic to teach in chemistry is
a) Chemical reactions
b) bonding
c) Moles
d) Gas Laws
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) Avogadro's number
b) chemical equations
c) Stoichiometry
d) moles
What is a reason to have a lower actual yield than your theoretical yield?
a) The actual yield is always higher than the theoretical yield
b) It is impossible to get 100% yield, because too many things happen in the lab
c) No substances are ever pure, therefore actual yield is always lower
d) Laboratory settings are not perfect. Mistakes happen with transfer of chemicals and with calculations and/or rounding
I did all of my calculations, my lab, and my percent yield was 245%. What happened?
a) I am really good at chemistry
b) I made a mistake
c) I used the wrong chemicals
d) My chemical equation was balanced.
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