Percent Composition Empirical Molecular Formula
Authored by Charles Martinez
Chemistry
10th - 12th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is Percent Composition?
The percent by mass of each element present in a compound
The simplest integer ratio of atoms in a compound
It is to show the number of atoms in one molecule
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How do you determine the percent composition?
By knowing the empirical formula
By knowing the molecular formula
By knowing the mass of the element and the molar mass of the compound.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the the empirical formula?
To show the number of atoms in one molecule of a compound.
It is the simplest integer ratio of atoms in a compound.
It is the percent by mass of each element present in a compound.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What are the steps to finding the empirical formula?
1. Convert grams to moles 2.divide by the least number of moles. 3. change percentage to grams 4. multiply until whole.
1. divide by the least number of moles. 2.multiply until whole. 3.change percentage to grams 4. convert grams to moles.
1. change percentage to grams 2. convert grams to moles. 3. divide by the least number of moles. 4. multiply until whole
1. multiply until whole 2. divide by the least number of moles 3. convert gram to mole. 4. change percentage to grams
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the purpose of the molecular formula?
It is to show the number of atoms in one molecule of a compound.
to find the percent by mass of each element present in a compound
it is to find the simplest integer ratio of atoms in a compound.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the purpose of the molecular formula?
It is to show the number of atoms in one molecule of a compound.
to find the percent by mass of each element present in a compound
it is to find the simplest integer ratio of atoms in a compound.
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the molecular formula?
E= hv
14= pH+pOH
molecular-formula mass/ simplest- formula mass = X
PV= nRT
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