Name That Molecule!
What does an -ite or -ate ending in a polyatomic ion mean?
oxygen is in the formula
As the temperature of the gas in a balloon decreases, which of the following occurs?
a. Volume increases
b. Average kinetic energy decreases
c. Density decreases
Average kinetic energy decreases
Which state of matter expands when heated and is easy to compress?
Gas
What are the weakest attractions between two molecules?
a. ionic forces
b. Van der Waals forces
c. covalent forces
d. hydrogen forces
b. Van der Waals
The SI unit used to measure the number of representative particles in a substance
(Hint: This one's in jeopardy format!)
What is the mole?
What is the correct name for the N3- ion?
nitride
What happens to the temperature of a liquid as it evaporates?
It decreases
Which color of visible light has the shortest wavelength?
a. yellow
b. green
c. blue
d. violet
d. Violet!
The longest wavelength is red, and the shortest is violet.
How many valence electrons are in a silicon atom?
4
How many moles of silver atoms are in 1.8 x 1020 atoms of silver?
0.000299
or 3 x 10-4
When dissolved in water, acids produce...
hydrogen ions
A gas occupies a volume of 2.4 L at 14.1 kPa. What volume will the gas occupy at 84.6 kPa?
Use Boyle's Law P1V1=P2V2
0.4 L
Which of the following changes to a metal is a chemical change?
a. bending
b. melting
c. rusting
d. polishing
c. Rusting
What is the shape of a molecule with a triple bond?
linear
What is the mass of silver in 3.4 g AgNO3?
2.16 g
What is the correct name for N2O5?
dinitrogen pentoxide
Why does the pressure inside a container of gas increase if more gas is added to the container?
There is an increase in the number of collisions between particles and the walls of the container.
What is the most electronegative element on the periodic table?
(Hint: think about your periodic trends!)
Flourine
What is the formula of the ion formed when phosphorus achieves a noble-gas electron configuration?
P3-
What is the number of moles in 9.63 L of H2S gas at STP?
0.43 mol
What is the correct formula for calcium dihydrogen phosphate?
Ca(H2PO4)2
If 4 moles of gas are added to a container that already has 1 mole of gas, how will the pressure change inside the container?
(hint: how many times higher will it be?)
The pressure will be 5 times higher
How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?
50 protons, 50 electrons, 75 neutrons
What is the electron configuration for the calcium ion?
Hint: remember to calculate using the ion!
1s22s22p63s23p6
What mass of sucrose (C12H22O11) is needed to make 500 mL of a 0.2M solution?
34.2 g sucrose