Unit 4 Study Guide Directions: Complete on a separate piece of paper. OH 1. Calculate the percent composition of the first element in the formulas for each of the following compounds. a. CO₂ b. N₂O c. NaOCI 2. Give the empirical formula that corresponds to each of the following molecular formulas. a. Na₂O₂ b. CsH604 c. C12H12N2O3 d. C4H6Cl2 3. A compound used in the nuclear industry contains uranium and fluorine. The compound is made up of 67.61% uranium. a. What is percent composition of fluorine? b. What is the empirical formula of the compound?

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Hello I was wondering if you could please create an answer key with no work since the paper is asking us for both however I’d just like the answer key to see as a reference that my answers will be correct thank you so much sorry for the bother :)
132 boboto zimodt safesles ohups brionad ni Name
Period
Date
Unit 4 Study Guide
Directions: Complete on a separate piece of paper.
1. Calculate the percent composition of the first element in the formulas for each of
the following compounds.
a. CO₂
jonborg b. N₂O
c. NaOCI
2. Give the empirical formula that corresponds to each of the following molecular
formulas.
a. Na₂O₂
b. C8H604
c. C12H12N2O3
d. C4H6Cl2
3. A compound used in the nuclear industry contains uranium and fluorine. The
compound is made up of 67.61% uranium.
a. What is percent composition of fluorine?
b. What is the empirical formula of the compound?
4. During excessive physical activity, lactic acid (molar mass = 90.08 g/mol) forms
in muscle tissue and is responsible for muscle soreness. Elemental analysis shows
that this compound contains 40% C, 6.71% H, and 53.3% O.
a. Determine the empirical formula of lactic acid.
b. Determine the molecular formula.
5. Consider the balanced chemical equation
4Al(s) +30₂(g) →2Al₂O₂ (s)
a. What mole ratio would you use to calculate how many moles of oxygen
gas would be needed to react completely with a given number of moles of
aluminum metal?
b. What mole ratio would you use to calculate the number of moles of
product that would be expected if a given number of moles of aluminum
metal reacts completely?
6. According to the following balanced equation, calculate the moles of hydrogen
produced from 52.6 moles of iron.
3H₂SO₂(aq) + 2Fe(s) → Fe₂(SO₂), (aq) + 3H₂(g)
>
.
Transcribed Image Text:132 boboto zimodt safesles ohups brionad ni Name Period Date Unit 4 Study Guide Directions: Complete on a separate piece of paper. 1. Calculate the percent composition of the first element in the formulas for each of the following compounds. a. CO₂ jonborg b. N₂O c. NaOCI 2. Give the empirical formula that corresponds to each of the following molecular formulas. a. Na₂O₂ b. C8H604 c. C12H12N2O3 d. C4H6Cl2 3. A compound used in the nuclear industry contains uranium and fluorine. The compound is made up of 67.61% uranium. a. What is percent composition of fluorine? b. What is the empirical formula of the compound? 4. During excessive physical activity, lactic acid (molar mass = 90.08 g/mol) forms in muscle tissue and is responsible for muscle soreness. Elemental analysis shows that this compound contains 40% C, 6.71% H, and 53.3% O. a. Determine the empirical formula of lactic acid. b. Determine the molecular formula. 5. Consider the balanced chemical equation 4Al(s) +30₂(g) →2Al₂O₂ (s) a. What mole ratio would you use to calculate how many moles of oxygen gas would be needed to react completely with a given number of moles of aluminum metal? b. What mole ratio would you use to calculate the number of moles of product that would be expected if a given number of moles of aluminum metal reacts completely? 6. According to the following balanced equation, calculate the moles of hydrogen produced from 52.6 moles of iron. 3H₂SO₂(aq) + 2Fe(s) → Fe₂(SO₂), (aq) + 3H₂(g) > .
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