Portage Chem 103 Final
Study online at https://quizlet.com/_dls3w8
1. Convert 0.000924 to exponential form and ex- Convert 0.000924 = small-
plain your answer. er than 1 = negative ex-
ponent, move decimal 4
places = 9.24 x 10-4
2. Convert 8.32 x 102 to ordinary form and ex- Convert 8.32 x 102 = posi-
plain your answer. tive 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
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 signifi-
cant 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)
, Portage Chem 103 Final
Study online at https://quizlet.com/_dls3w8
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 ele-
ment) - no element names
(not compound) appears
as more than one sub-
stance (dough, cheese,
pepperoni) = Hetero Mix
14. Potassium oxide Potassium oxide - is not on
periodic table (not element)
- has two element names =
Compound
15. Phosphorus Phosphorus - is on periodic
table = Element
16. Fireworks exploding Fireworks exploding - ex-
plosion always = chemical
change
17. Sweat evaporates from your skin Sweat evaporates from
your skin - evaporate =
physical change
18. Fruit spoils Fruit spoils - formation
of another substance, a
change in odor, smell, etc =
chemical change
19. Show the full Nuclear symbol including any 127I53-1
+ or - charge (n), the atomic number (y), the
mass number (x) and the correct element atomic number = 53
symbol (Z) for each element for which the mass number = 53+74 =
protons, neutrons and electrons are shown - 127
symbol should appear as follows: xZy+/- n Element = Iodine = I
charge = -1 53 -54 = -1
Study online at https://quizlet.com/_dls3w8
1. Convert 0.000924 to exponential form and ex- Convert 0.000924 = small-
plain your answer. er than 1 = negative ex-
ponent, move decimal 4
places = 9.24 x 10-4
2. Convert 8.32 x 102 to ordinary form and ex- Convert 8.32 x 102 = posi-
plain your answer. tive 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
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 signifi-
cant 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)
, Portage Chem 103 Final
Study online at https://quizlet.com/_dls3w8
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 ele-
ment) - no element names
(not compound) appears
as more than one sub-
stance (dough, cheese,
pepperoni) = Hetero Mix
14. Potassium oxide Potassium oxide - is not on
periodic table (not element)
- has two element names =
Compound
15. Phosphorus Phosphorus - is on periodic
table = Element
16. Fireworks exploding Fireworks exploding - ex-
plosion always = chemical
change
17. Sweat evaporates from your skin Sweat evaporates from
your skin - evaporate =
physical change
18. Fruit spoils Fruit spoils - formation
of another substance, a
change in odor, smell, etc =
chemical change
19. Show the full Nuclear symbol including any 127I53-1
+ or - charge (n), the atomic number (y), the
mass number (x) and the correct element atomic number = 53
symbol (Z) for each element for which the mass number = 53+74 =
protons, neutrons and electrons are shown - 127
symbol should appear as follows: xZy+/- n Element = Iodine = I
charge = -1 53 -54 = -1
