TEST review
What is the net ion charge of beryllium?
+2
When [OH-] changes from 10-9 to 10-11 in a solution: Kw = [H+][OH-] What is the [H+] after the change?
-3
Which of the following is not equal to 46.3 meters?
0.00463 km
How many moles of CO4 are in 870 mL of a 0.75 M solution?
0.65 moles
Match the following associations. 1 2 3 4
4 3 2 1
What is the approximate vapor pressure when the gas condenses at 80°C?
400
When entering coefficients to balance equations, recall that just writing the symbol implies "1." Therefore, if a coefficient of "1" is required, choose "blank" for that box. Balance the following equation. 2C2H2 + O2 → 4CO2 + H2O
5 2
Why does the ionization energy change when moving down a group of elements?
The attractive force decreases as the atom gets larger.
Select all that apply. What do the elements of a period have in common?
They have the same number of electron shells. They transition from a metal to inert gas.
The splitting apart of atomic nuclei is known as
fission
Which of the radioactive emissions has the highest energy?
gamma
Electronegativity _____.
generally increases moving from left to right across a period
A straight chain hydrocarbon with the formula C6H12:
has a double C-C bond
When [OH⁻] changes from 10-9to 10-11in a solution: Kw = [H+][OH-] What happens to [H+]?
increases
In an open system, the vapor _____ is equal to the outside air pressure.
pressure
A theory which repeatedly fails to confirm the expected predictions:
probably should be discarded
Read the following redox reaction and determine which reactant is reduced and which is oxidized. F2 + Zn → ZnF2 This equation shows that F2 is and Zn is
reduced oxidized
A solution which contains maximum solute at a given temperature is
saturated
Which energy level requires the most energy to remove an electron?
the innermost shell
The point where the blue line intercepts the temperature axis is:
the theoretical zero volume temperature of a gas
The electrons which are primarily responsible for chemical bonds are:
the valence electrons
The method used to determine the equivalence point of an acid-base solution is called:
titration
In the reaction 2NaCl + 2H2O → 2NaOH + C12 + H2, the reactants should:
weigh the same as the products
At STP conditions, 0.25 moles of CO2(g), H2(g), NH3(g):
will contain the same number of molecules will occupy the same volume
A 4,000 mL solution of AgNO3 contains 17.00 g of solute in water. Calculate the molarity (molar concentration) of the solution.
3 x 10 -2M
Which element will have the greatest attraction for the calcium electrons (if they could combine)?
N
Select all that apply. Which properties are characteristic of true solutions?
Particles are dissolved. Particles are dissolved.
The minimum energy required to start a reaction is:
activation energy (A.E.)
What are the terms that describe these values for the element oxygen?
atomic mass atomic number
Which of the following is not a physical property of elements?
combustibility
_____ is a measure of the quantity of matter in an object.
mass
When components do not combine chemically, it is a _____.
mixture