WorksheetsReview Session 4
Total questions: 9
Worksheet time: 5mins
A gas behaves like an ideal gas. How many moles of 44.8 liters of this gas have at sea level and 0 degrees Celsius?
6.023 *10^23
2
1
.8
Four gases that do not react among each other are placed in a closed container. Which of the following best describes the total pressure exerted on the walls of the container
The pressure of the heaviest gas
The arithmetic mean of the partial pressures
The difference between the heaviest and lightest gas
The sum of the partial pressures
The chemical properties of an element are determined by
The atomic mass of the element
The total number of protons
The electrons in the outermost energy level
The volume of the atom
The nature of the radiation of beta decay (symbol shown above) is characterized by
helium nuclei
high-energy photons
electrons
conversion of a proton to a neutron
Cobalt-60 is a radioactive element with a half-life of 5.3 years. What approximate percentage of about 200 grams of this radioactive element will be available after 20 years?
2%
7%
10%
12%
In 20 grams of pure NaOH, there are
.5 mol of NaOH
1 mol of NaOH
2 mol of NaOH
4 mol of NaOH
Chlorine forms an ionic compounds with the following elements:
I. Calcium
II. Phosphorous
III. Sulfur
I only
II only
I and II
II and III
Find the number of neutrons of the Uranium-235 isotope.
92
143
147
235
The approximate percent composition of chlorine in HClO is:
30.5%
41.6%
55.2%
67.6%
