
Empirical Stoichiometry
Authored by Sean Holmes
Chemistry
10th - 12th Grade
Used 6+ times

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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements is the correct definition of an empirical formula?
It is a formula that calculates the coefficients of a compound in a balanced equation.
It is the simplest or lowest whole-number ratio of moles of elements in the compound.
It is the whole number ratio of moles of elements in the compound.
It is the number ratio of moles of elements in the compound.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the empirical formula of the following molecular formula: C3H6
C3H6
CH2
C2H4
CH3
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following formulas represents an empirical formula?
H2O2
C2H6O12
CaCl2
N2O8
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which pair has the same empirical formula?
NaCrO4 and Na2Cr2O7
C2H4O2 and C6H12O6
C3H6O3 and C2H6O2
CH4 and C2H6
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A compound came out with the following ratio:
3 Carbon to 1.49 Phosphorus to 2 Oxygen. Which of the following is the correct empirical formula?
Ca6P3O4
C3PO2
C6P3O4
C3P3O2
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A compound came out with the following ratio:
1.5 Carbon to 2.25 Phosphorus to 3 Oxygen. Which of the following is the correct empirical formula?
C6P3O4
C6P9O12
C2P2O3
C3P5O6
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
4 moles Fe
6 moles Fe
9 moles Fe
2 moles Fe
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