Elements of Chemistry
Lecture Review : Chapter 1
TWO SIGNIFICANT FIGURES !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1] This phase of matter has tightly packed particles with strong intermolecular forces - Solid
2] This phase of matter has particles that are close together but not tightly held - Liquid
3] Label each of the following examples of matter as being an element, compound, or mixture:
Diet coke mixture
titanium element
Wedding cake compound
‘silverware’ Compound
Nitrogen gas Element
calcium element
ice compound
MgCO3 Compound
tea with ice Mixture
4] Given the equation, 1.8 C = F -32, and knowing the conversion from ⁰C to K, convert the following:
a)
45 ⁰C =
d) -5 ⁰ F =
⁰F
b) 30 ⁰ =
K
e)
450 K =
K
c) 180 ⁰ F =
⁰C
C
5] Tell how many significant figures are in each of the following numbers: a) 45.0 g 3
b)
.0079 m 2
c) 3.45 x 105 mm = 3
d) 45 000 000 mg = 2
6] Calculate the following with labeling and rounding off correctly: a) 5.6 cm x 3.2 cm = 16.8cm
c)
4.32 g + 1.1 g + 22.15 g + .0024 g =
d)
(3.4 cm x .152 cm x 5.62 cm ) divided by 1.85 cm =
d) 56.3 m - 28 m =
7] Use unit conversion setups to solve the following with labeling and rounding off correctly :
a) 6 000 000 inches is how many miles? (1 mile = 5280 feet)
95 miles
b)
.45 mL/sec would be how many gallons per day? (946 mL = 1 quart, 4 quarts = 1 gallon)
10 gallons
c)
45.4 grams of salt would be how many moles of salt? (1 mole salt, NaCl, = 58.5 grams)
.776 moles
8] Convert the following metric units: a) 456 cm = .456m
c)
.000 56 kg = .56g
d) 56.3 cm = 563mm
b) 45 000 mL = .045kL
e) .004 g = 4mg
9] Convert the following numbers into scientific notation from Arabic or vice versa:
a) .000 000 45 L = 4.5 * 10^-7
b)
650 000 000 000 mg = 6.5 * 10^11
c)
5.2 x 106 mm =
d) 9.8 x 103 L = 9,800
e) 3.2 x10-4 kg = .000 32
5 200 000
10] What is the density of ethyl alcohol if 53 mL of ethyl alcohol has a mass of 42 grams?
.79g/mL
11] What is the mass of 2,000 mL of an intravenous glucose solution with a density of 1.15 g/mL?
2,300g
12] Mercury has a specific gravity of 13.6. How many mL of mercury has a mass of .35 kg?
26 mL