Moles to Grams
In a Moles to Grams Problem the molar mass is up top (in the numerator) OR down below (in the denominator)?
up top (in the numerator) so you multiply!
In a Grams to Moles Problem the molar mass is up top (in the numerator) OR down below (in the denominator)?
down below (in the denominator) - so you divide!
Step one of an empirical formula problem is to convert to what unit from grams?
Moles!
Step One of a Percent Composition Problem is to find the:
Molar Mass
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How many grams are in 3.50 moles of Lithium?
24.29 grams of Lithium
How many moles are in 67 grams of Lithium?
9.65 moles
Once you have all the moles in a empirical formula problem you divide by the smallest or biggest number?
smallest
What is the percent composition of Oxygen in H2O?
88.79%
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How many grams are in 0.55 moles of H2O?
9.911 grams
How many moles are in 7.02 grams of H2O?
0.390 moles
Determine the empirical formula for a compound that is 15.8% carbon and 84.2% sulfur.
CS2
What is the percent composition of Hydrogen in H2O?
11.21%
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How many grams are in 2.22 moles of NaOH?
88.8 grams
How many moles are in 1,000 grams of NaOH?
25 moles
Determine the empirical formula for a compound that is 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen.
CH2O
What is the percent composition of Oxygen in Mg(OH)2?
54.89%
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