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FINAL_EXAM_CHE121
Question 1
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Scientific Calculator (Links to an external site.) Periodic Table Equation Table
Do the three conversions shown below, showing all work:
1. 328 K = ?
o C
2. 76
o C = ?o F
3. 135
o
F = ? K
1. 328K - 273 = 55
o
CK →
o C (make smaller) -273
2. 76
o C x 1.8 + 32 = 168.8 o F o C → o F (make larger) x 1.8 + 32
3. 135
o
F - 32 ÷ 1.8 = 57.2 + 273 = 330.2 K
o F → o
C →K
Question 2
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Scientific Calculator (Links to an external site.) Periodic Table Equation Table Classify each of the following 3 as an element, compound, solution or heterogeneous mixture and explain your answer.
1.Pepperoni Pizza 2.Potassium oxide 3.Phosphorus 1 / 2
This study source was downloaded by 100000829684747 from CourseHero.com on 06-22-2022 20:20:41 GMT -05:00
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1.Heterogeneous Mixture; Pepperoni Pizza - is not on periodic table (not element) - no element names (not compound)appears as more than one substance (dough, cheese, pepperoni) = Hetero Mix 2.Compound; Potassium oxide - is not on periodic table (not element) - has two element names = Compound 3.Element; Phosphorus - is on periodic table = Element Question 3
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Scientific Calculator (Links to an external site.) Periodic Table Equation Table Show the calculation of the number of grams in the given amount of the following 2 substances.Report your answer to 1 place after the decimal.
1.
1.20 moles of Al2(CO3)3 2.
1.04 moles of C8H6NO4Cl 1.Grams = Moles x molecular weight = 1.20 x 233.99 = 280.8 grams 2.Grams = Moles x molecular weight = 1.04 x 215.59 = 224.2 grams Question 4
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Scientific Calculator (Links to an external site.) Periodic Table Equation Table Balance each of the following 3 equations by placing coefficients in front of each substance.C8H18 + O2 → CO2 + H2O
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