WorksheetsUnit 4 Review
Total questions: 20
Worksheet time: 10mins
if 100 grams of vinegar and 5 grams of baking soda are poured in a container, a small amount of gas will be produced. What will the final mass of the products be if the gas is trapped in the container?
100 grams
104 grams
105 grams
110 grams
For the reaction between silver nitrate and sodium chloride, which of the following would be a product?
AgNO3 + NaCl →
AgNa
ClNO3
Na3NO
AgCl
An aluminum ion has a charge of +3, and an oxide ion has a charge of -2. Which would be the product of a reaction between these two elements.
Al2O
Al2O3
2AlO3
Al3O
Which best describes chemical synthesis?
an amount of acid reacting with an equal amount of base
heat being given off as two elements react with each other
a compound being broken down into smaller compounds
two or more elements combining to form a new compound
Use chemical equation to answer the question that follows.
C + O2 → CO2
What type of reactio occurs when carbon dioxide is formed from carbon and oxygen?
synthesis
decomposition
single displacement
double replacement
The chemical equation below shows a reaction of copper (Cu) with silver nitrate (AgNO3) yielding sliver (Ag) and copper (II) nitrate (Cu(NO3)2).
Cu + 2AgNO3 → 2Ag + Cu(NO3)2
reactants
products
catalysts
inhibitors
Which of these is a decomposition reaction?
2KClO3 → 2KCl + 3O2
2H2 + O2 → 2H2O
Fe + CuCl2 → FeCl2 + Cu
NaOH + HCl → NaCl + H2O
What type of reaction occurs when potassium iodide is conbimed with lead (II) nitrate?
combustion
synthesis
single replacement
double repalcement
A nuclear power facility harness energy via what energy process?
nuclear fusion
chemical reaction
nuclear fission
cold fusion
How do the nuclear reactions that power the Sun compare to the nuclear reactions that occur in a reactor at a nuclear power facility?
The Sun is powered via nuclear fusion while a nulear power facility harnesses energy from nuclear fission
The Sun is powered via nuclear fission while a nuclear facility harnesses energy from nuclear fusion
Both the Sun and a nuclear power facility are powered nuclear fusion reactions
Both the Sun and a nuclear power facility are powered nuclear fission reactions
What kind of medical treatment is used to target and destroy rapidly proliferating tissues, such as tumors, while doing as little damage to nearby healthy tissues?
CAT Scan
PET scan
radiation therapy
MRI
Half of a sample of cobalt-60 decays after 5.26 years to form atoms of another element. Half of a sample of iodine-131 decays after 8.1 days to form atoms of another element. Which best explains this difference?
Iodine-131 has a smaller atomic number than cobalt-60
Iodine-131 has half the radioactive energy of cobalt-60
Iodine-131 has a smaller atomic mass than cobalt-60
Iodine-131 has a shorter half-life than cobalt-60
Physicists have described four basic forces in the universe. Which one of the four basic forces holds the protons together within the nucleus of the oxygen atom in a water molecule?
electromagnetic force
gravitational force
strong force
weal force
Isotopes of hydrogen react, forming the element helium, as shown.
This reaction is best classified as which?
nuclear decay
nuclear fission
nuclear fusion
nuclear half-life
When two nuclei are combined into one nucleus, there is a slight change in mass and the release of a large amount of energy. What is this process called?
conversion
reaction
fission
fusion
Christopher drew a graph to show changes in the mass of Barium-122 (Ba) during 10 minutes of radioactive decay.
Based on the results, what is the half-life of Barium-122 in minutes?
1
2
5
10
Carbon-14 has a radioactive hal-life of 5700 years. If an organism has 10g of carbon-14 in its body at the time of its death, how much carbon-14 will remain after 5700 years?
10g
5g
7.5g
2.5g
Uranium-235 decays to form lead-207. The half-life of uranium-235 is 704,000,000 years. What is the approximate age of an igneous rock with a 1:1 ratio of uranium-235 atoms to lead-207 atoms?
176,000,000 years
352,000,000 years
704,000,000 years
1,408,000,000 years
Which occurs in a fusion reaction between two atoms?
Energy is absorbed as a less stable element forms.
A new element is formed and energy is released
Energy is converted into mass and forms a heavier element
The nuclei of the atoms are split apart and energy is released
Nitric acid can oxidize iron (II) to iron (III) ions by the following reaction.
HNO3 + Fe+2 + H+ → NO + Fe+3 + H2O
What is the coefficient for water after the equation is balanced?
1
2
3
4
