1. Chemistry
2. Physical Chemistry
3. Stoichiometry
4. 43818

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Question 1
If matter is uniform throughout and cannot be separated into other
substances by physical means, it is _______.

a compound
an element
a homogeneous mixture
either an element or a compound
a heterogeneous mixture

Question 2
Which one of the following is not a physical property of water?

Water exists in solid, liquid and gaseous forms.
It boils at 100oC at a pressure of 1 atm.
It is clear and colorless.
It freezes at 0oC.
It reacts rapidly with potassium metal to form potassium hydroxide.

Question 3
1 milligram = _____ micrograms

1,000
10
0.1
0.01
0.001

Question 4
The density of silver is 10.5 g/cm3. What volume (cm3) would be
occupied by a piece of silver with a mass of 61.3 g?

0.00155
644
0.171
10.5
5.84

Question 5
In the Rutherford nuclear-atom model, _______.

the three principal subatomic particles (protons, neutrons, and
electrons) all have essentially the same mass and mass is spread
essentially uniformly throughout the atom
mass is spread essentially uniformly throughout the atom
the light subatomic particles, protons and neutrons, reside in the
nucleus
the heavy subatomic particles, protons and neutrons, reside in the
nucleus
the three principal subatomic particles (protons, neutrons, and
electrons) all have essentially the same mass

Question 6
An atom of the most common isotope of gold, 197Au, has _____
protons, _____ neutrons, and _____ electrons.

79, 197, 197
118, 79, 39
79, 118, 118
79, 118, 79
197, 79, 118

Question 7
All atoms of a particular element contain the same number of
_______.

protons and neutrons
subatomic particles
protons
neutrons
protons, neutrons, and electrons

Question 8
In the symbol below, x = _____.

13
6
19
7
Not enough information to determine

Question 9
In the periodic table, the elements are arranged in __________.

order of increasing atomic number
order of increasing metallic properties
alphabetical order
reverse alphabetical order
order of increasing neutron content

Question 10
Elements in Group 7A are known as the _______.

halogens
alkaline earth metals
alkali metals
noble gases
chalcogens