Created by Tara L. Moore
1a.
What is a homogeneous mixture?
1b.
What is a heterogeneous mixture?
1c.
Is table salt, NaCl, a homogeneous mixture?
2.
Perform the following operations and round off to the correct number.
a.
2.680 ft + 11.40 ft b. 511.0 mi /2.20
hr c. 423.1 * 0.256 in – 116.0 in
3.
A foundry releases 10.0 tons of gas into the atmosphere each day. The gas
contains 2.2% sulfur dioxide by mass. What mass of sulfer dioxide is released
in one week?
4.
Calculate the heat required to raise the temperature of 95.2 grams of water
from 10.0C to 35.0C.
5.
Write the chemical formula for each of the following ions and ionic compounds.
a. Ammonium Ion
b.
Potassium
Ion
c.
calcium
Oxide
6.
Name
each of the following ions and ionic compounds.
7.
Classify each of the following as an element, a compound or a mixture.
point pen
e. Toothpaste f.
Water
1a.
A homogeneous mixture has uniform composition throughout
1b.
A heterogeneous mixture has variable/ non-uniform composition throughout the
sample.
1c.
No, while it is homogeneous, it is not a mixture. It is a single substance
2a. 14.08 ft
2b. 232 mi/hr
2c. -8 in
3. (10.0 tons of gas/day) * (2.2 tons SO2
/ 100 tons gas) = 0.22 tons So2 / day
(0.22 tons So2 / day) *
(7 days/week)
1.5
tons SO2/ week
4.
Amount
of Heat = (Specific heat) * ( Mass of Substance) ( Temperature Change)
1.0
cal/g*C
* 95.2g * (35.0C – 10C) = 2.38 Kcals
Alternatively, using the specific heat of water in
Joules
4.18J/g*C * 95.2 g ( 35.0C – 10.0C) = 9.95 kJ
5a. NH4 +
5b. K+
5c. CaO
6a. Sodium
6b. Sulfate
6c. Magnesium Hydroxide
7a.
Mixture
7b.
Element
7c.
Compound
7d.
Mixture
7e.
Mixture
7f.
Water