Chem 103 Final Exam Portage Learning Latest Questions and answers.

Chem 103 Final Exam Portage Learning Latest
Questions and answers

,1. Convert 0.000924 to exponential form and Convert 0.000924 =
explain your answer. smaller than 1 = negative
exponent, move decimal 4
places = 9.24 x 10-4

2. Convert 8.32 x 102 to ordinary form and Convert 8.32 x 102 =
explain your answer. positive exponent =
larger than 1, move
decimal 2 places =
832

3. 3.6 pounds = ? oz 3.6 pounds x 16 oz / 1
pound= 57.6 oz

4. 2680 ml = ? liters 2680 ml x 1 liter / 1000 ml
= 2.68 liters

5. 78oC = ? oK 78oC + 273 = 351 oK oC ’
oK (make larger) +273

6. 248oF = ? oC 248oF - 32 ÷ 1.8 = 120 oC
oF ’ oC (make smaller) -32
÷1.8

7. 427oK = ? oF 427oK - 273 = 154 oC x 1.8
+ 32 = 309.2 oF oK ’ oC ’ oF

8. Show the calculation of the density of D = M / V = 40..9 =
bromine if 40.3 g occupies 12.9 ml. 3.12 g/ml
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, 9. Show the calculation of the volume of 28.6 V = M/D V = 28.6g/0.817
grams of kerosene with density of 0.817 g/ml g/ml = 35.0 ml

10. 0.0756 contains ? significant figures.

0.0756 = contains 3 significant figures


11. 1.235 contains ? significant figures.

1.235 contains 4 significant figures


12. 0.0756 + 1.235 = ? (give answer to correct number of significant
figures)
0.0756 + 1.235 = 1.3106 = 1.311 (to the thousands place for 1.235)


13. Pepperoni Pizza 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