Percent Composition
Find the percent composition to: NaCl
Na: 39
Cl: 60
The molecular formula for glucose is C6H12O6. What is the empirical formula of glucose?
CH2O
2 H2 + O2 ---> 2 H2O
What is the O2 / H2O molar ratio?
1:2
What do we take from our chemical equation to use in mole to mole converting problems?
Coefficients
Find the percentage composition H in this compound:(NH₄)₂S (round to the tenths)
11.8%
What is the empirical formula for CO3H3?
CO3H3
2 H2 + O2 ---> 2 H2O
Suppose you had 20 moles of H2 on hand and plenty of O2, how many moles of H2O could you make?
20
What are three ways to write a molar ratio?
colon, per, fraction
Al2(SO2)3
Al: 21%
O: 40%
S: 40%
What is the empirical formula for Al6(SO4)3?
*apply the the 3*
Al2SO4
2KBr + Cl2 --> 2KCl + Br2
If 1.78 moles of KBr react with enough chlorine, how many moles of bromine are produced?
0.89
Can you use coefficients in an unbalanced chemical equation?
No
Find the percentage composition of O in this compound: NaOH (round to the tenths)
40%
Find the empirical formula for 9.3% of Ag and 0.69% of O?
*Don't multiply your final answer based on the decimals. Just leave as is*
Ag: 2
O: 1
2KClO3-->2KCl+3O2
How many moles of O2 can be produced by reacting 12.0 moles of KClO3?
18
How to you get rid of your given unit in a problem?
Divide by the same unit; make sure it is on the bottom
All percentages should add up to what?
100
What is the difference between empirical format and molecular format?
Empirical is the reduced version
How many moles are in 62 grams of Phosphorus?
2