Consider a situation in which 235 g of P4 are exposed to 272 g of O2 . Part A What is the maximum number of moles of P2O5 that can theoretically be made from 235 g of P4 and excess oxygen? Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HA ? Value Units Submit Part B What is the maximum number of moles of P20; that can theoretically be made from 272 g of O2 and excess phosphorus? Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HA ? Value Units
Consider a situation in which 235 g of P4 are exposed to 272 g of O2 . Part A What is the maximum number of moles of P2O5 that can theoretically be made from 235 g of P4 and excess oxygen? Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HA ? Value Units Submit Part B What is the maximum number of moles of P20; that can theoretically be made from 272 g of O2 and excess phosphorus? Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) HA ? Value Units
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Transcribed Image Text:I Review I Constants I Periodic Table
Learning Goal:
Consider a situation in which 235 g of P4 are exposed to 272 g of O2 .
To calculate theoretical and percent yields, given
the masses of multiple reactants.
A balanced chemical reaction gives the mole ratios
between reactants and products. For example, one
mole of white phosphorus, P4, reacts with five
moles of oxygen, O2 , to produce two moles of
diphosphorus pentoxide, P205 :
Part A
What is the maximum number of moles of P2O5 that can theoretically be
made from 235 g of P4 and excess oxygen?
Express your answer to three significant figures and include the
appropriate units.
P4 + 502→2P2O5
In this example, if we know the number of moles of
phosphorus, we know that twice that much product
can be made, assuming we have enough oxygen.
Similarly, if we know the number of moles of
oxygen, we know that two-fifths that much product
can be made, assuming we have enough
phosphorus. In a situation where you are given the
mole amounts of both reactants, you should do this
type of calculation individually for each one, finding
two different values for the amount of product. The
smaller of these two values is the maximum
• View Available Hint(s)
TH HẢ
?
Value
Units
amount of product that can be made, also known
as the theoretical yield.
Submit
you are given the masses of the reactants, you
will first have to convert to moles. Once you have
mole amounts, you can follow the procedure
described above, applying the ratios shown in the
balanced chemical equation.
Part B
What is the maximum number of moles of P2O5 that can theoretically be
made from 272 g of O2 and excess phosphorus?
Express your answer to three significant figures and include the
appropriate units.
View Available Hint(s)
HA
?
Value
Units
Submit
Part C Complete previous part(s)
Part D Complete previous part(s)
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