Stoichiometric Calculations and Dimensional Analysis - College Chemistry
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Consider the unbalanced equation for the combustion of pentane:
How many grams of 
is required to react with exactly 
of 
.
Consider the unbalanced equation for the combustion of pentane:
How many grams of
Start by balancing the given chemical equation:
Next, convert the grams of pentane into moles of pentane.
Use the stoichiometric ratio given by the balanced equation to find the number of moles of oxygen needed to react with the pentane.
Finally, convert the number of moles of oxygen into grams of oxygen.
There should be 
significant figures, so the answer is 
.
Start by balancing the given chemical equation:
Next, convert the grams of pentane into moles of pentane.
Use the stoichiometric ratio given by the balanced equation to find the number of moles of oxygen needed to react with the pentane.
Finally, convert the number of moles of oxygen into grams of oxygen.
There should be
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Consider the following unbalanced reaction:
How many grams of 
can be produced if 
of 
is mixed with 
of 
?
Consider the following unbalanced reaction:
How many grams of
Start by balancing the equation:
Next, figure out which reactant is the limiting reactant.
Since fewer moles of 
is produced when 
is reacted, then 
must be the limiting reactant.
Convert the amount of moles of 
into grams.
Start by balancing the equation:
Next, figure out which reactant is the limiting reactant.
Since fewer moles of
Convert the amount of moles of
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Use the equation shown to determine how many grams of water form when 
of 
reacts completely with 
at 
.
Use the equation shown to determine how many grams of water form when
Use the relations 
, molar mass 
, and 
Use the relations
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What is the mass in 
of a gas with a volume of 
and a density of 
?
What is the mass in
For this question, we're given the density and volume of a gas and we're asked to find the mass of the gas.
To answer this question, we'll need to use dimensional analysis. What this means is that we'll need to cancel out units in order to obtain the ones that we're looking for.
For this question, we're given the density and volume of a gas and we're asked to find the mass of the gas.
To answer this question, we'll need to use dimensional analysis. What this means is that we'll need to cancel out units in order to obtain the ones that we're looking for.
Compare your answer with the correct one above