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Chem 121 module 1 exam questions and answers portage learning
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Chem 121 module 1 exam questions and answers portage learning
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Question 1You may find the following resources helpful:
Scientific Calculator (Links to an external site.)
Periodic Table
Equation Table
Complete the two problems below:
1. Convert 1005.3 to exponential form and explain your answer.
2. Convert 4.87 x 10-6 to ordinary form and explain your answer.
1. Convert 1005.3 = larger than 1 = positive exponent, move
decimal 3 places = 1.0053 x 103
2. Convert 4.87 x 10-6 =negative exponent =smaller than 1, move
decimal 6 places = 0.00000487
Question 2
You may find the following resources helpful:
Scientific Calculator (Links to an external site.)
Periodic Table
Equation Table
Using the equation bank, complete the two conversions shown
below, showing all work:
1. 3.6 pounds = ? oz
2. 2680 ml = ? liters
1. 3.6 pounds x 16 oz / 1 pound= 57.6 oz
This study source was downloaded by 100000817935606 from CourseHero.com on 12-31-2021 01:18:55 GMT -06:00
https://www.coursehero.com/file/79889687/Module-1-EXAM-CHE121docx/
, 2. 2680 ml x 1 liter / 1000 ml = 2.68 liters
Question 3
You may find the following resources helpful:
Scientific Calculator (Links to an external site.)
Periodic Table
Equation Table
Do the three conversions shown below, showing all work:
1. 78oC = ? K
2. 248oF = ? oC
3. 427 K = ? oF
1. 78oC + 273 = 351 K o
C → K (make larger) +273
2. 248oF - 32 ÷ 1.8 = 120 oC o
F → oC (make smaller) -32 ÷1.8
3. 427K - 273 = 154 oC x 1.8 + 32 = 309.2 oF K → oC → oF
Question 4
You may find the following resources helpful:
Scientific Calculator (Links to an external site.)
Periodic Table
Equation Table
Complete the two problems below. Be sure to show the correct
number of significant figures in each calculation.
1. Show the calculation of the mass of a 10.5 ml sample of mercury with
density of 13.5 g/ml.
2. Show the calculation of the volume of 21.3 grams of dioxane with density
of 1.03 g/ml.
This study source was downloaded by 100000817935606 from CourseHero.com on 12-31-2021 01:18:55 GMT -06:00
https://www.coursehero.com/file/79889687/Module-1-EXAM-CHE121docx/
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