Weekly Quizzes (Test 1)
c
1) Express the temperature, 275.18 K, in degrees Celsius. A) 274.17 °C B) 548.33 °C C) 2.03 °C D) 120.88 °C E) 22.78 °C
b
1) Of the three types of radioactivity characterized by Rutherford, which type does not become deflected by an electric field? A) α-rays B) γ-rays C) α-rays, β-rays, and γ-rays D) α-rays and β-rays E) β-rays
d
2) 1.55 kg/m3 is equivalent to ________ g/L. A) 1.55 × 10^-3 B) 1.55 × 10^3 C) 1.55 × 10^6 D) 1.55 E) 1.55 × 10^-6
a
3) Which of the following has the same number of significant figures as the number 0.0050? A) 4.0 B) 601 C) 99.000 D) 1.00 E) 0.9
b
4) The correct answer (reported to the proper number of significant figures) to the following is 4) ________. (12.67 + 19.2)(3.99) / (1.36 + 11.366) = ________ A) 9.9985 B) 1.00 × 101 C) 9.999 D) 9.99851 E) none of the above
a
4) Which of the following are chemical processes? 1. rusting of a nail 2. freezing of water 3. decomposition of water into hydrogen and oxygen gases 4. compression of oxygen gas A) 1, 3 B) 2, 3, 4 C) 1, 3, 4 D) 1,4 E) 1,2
b
5) An object measuring 77 milliliters will have a volume of ________ liters. A) 770 B) 0.077 C) 7700 D) 77000 E) 13
d
5) ________ is the abbreviation for the prefix milli-. A) n B) d C) M D) m E) k
a
6) A separation process that depends on differing abilities of substances to form gases is called ________. A) distillation B) chromatography C) filtration D) solvation E) All of the above are correct.
d
7) Which of the following is an illustration of the law of constant composition? 7) A) Water boils at 100 °C at 1 atm pressure. B) Water can be separated into other substances by a chemical process. C) Water is a compound. D) Water is 11% hydrogen and 89% oxygen by mass. E) Water and salt have different boiling points.
a
A combination of sand, salt, and water is an example of a ________. A) heterogeneous mixture B) homogeneous mixture C) compound D) solid E) pure substance
d
An element cannot ________. A) be part of a heterogeneous mixture B) be part of a homogeneous mixture C) interact with other elements to form compounds D) be separated into other substances by chemical means E) be a pure substance
a
The charge on the silver ion in the salt AgCl is ________ A) +1 B) +2 C) +4 D) +3 E) +5
b
The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is ________ amu. Masses: 220.90 220.00 218.10 A) 219 B) 220.40 C) 33.333 D) 219.67 E) 220.24
a
The element calcium is in a group known as the ________. A) alkaline earth metals B) halogens C) alkali metals D) transition metals E) noble gases
e
There are ________ protons, ________ electrons, and ________ neutrons in an atom of 129 Xe 54 A) 54, 75, 129 B) 54, 54, 129 C) 129, 129, 75 D) 129, 129, 129 E) 54, 54, 75
c
Which one of the following is not an intensive property? A) density B) temperature C) mass D) melting point E) boiling point
