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WorksheetsBenchmark 2 Review
Total questions: 22
Worksheet time: 12mins
Which of the following identifies the coefficient in the following chemical formula? 3NH4
1
2
3
4
Which of the following identifies the subscript in the following chemical formula? 3NH4
1
2
3
4
How many molecules are in the chemical formula 6CO2?
2
4
6
8
How many atoms of carbon are there in the chemical formula 6CO2?
1
6
12
18
How many atoms of oxygen are there in the chemical formula CO2?
1
2
3
4
How many atoms of oxygen are there in the chemical formula 6CO2?
4
6
12
18
The Law of Conservation of Mass states...
matter is created by chemical reactions.
matter is destroyed by combustion reactions.
matter is not created or destroyed.
matter is not changed.
Identify the chemical equation that supports the Law of Conservation of mass.
H2 + 2O2 ---> H2O
4Fe + 2O2 ---> 2Fe2O3
2H2 + O2 ---> 2H2O
H2 + N2 ---> NH3
Which of the following reactions support the Law of Conservation of Mass?
15g of reactant A + 10g of reactant B ---> 20g of product
8g of reactant ---> 3g of product A + 5g of product B
10g of reactant A + 3g of product B ---> 13g of product C
5g of reactant ---> 1g of product A + 3g of product B
Find the missing coefficient that will allow this equation to support the Law of Conservation of Mass. 2N + H2 → ___ NH
1
2
3
4
Determine which of the following substances are the reactants. 2C + 2O2 --> 2CO2
2C
2C + 2O2
2O2
2CO2
8. Find the missing mass of the following equation: 15 grams of reactant A + ____ grams of reactant B ----> 40 grams of product C
70 grams
10 grams
25 grams
20 grams
Which of the following descriptions correctly identify coefficient and subscript?
Coefficient tells you the number of atoms and the subscript tells you how many molecules.
They both tell you the number of atoms only.
Coefficient tells you how many molecules and the subscript tells you the number of atoms.
They both tell you how many molecules only.
Which of the following lists the reactants needed for photosynthesis to occur?
oxygen + glucose
carbon dioxide + oxygen
carbon dioxide + water
Water + oxygen
Where does the plant get the energy needed to 'fuel' the chemical reaction of photosynthesis?
water
the ground
oxygen
sunlight
How do producers get their food from the environment?
They obtain energy from the sun and store it as food.
They break down the nutrients in dead organisms or animal wastes.
They obtain energy and food from eating other organisms.
They use oxygen and glucose to make food.
What structure allows for the exchange of gases and is found in plant leaves?
Mitochondria
Stomata
Cells
Stem
How is carbon dioxide used in the chemical reaction of photosynthesis?
Carbon dioxide (CO2) is broken down and rearranged with atoms from water(H2O) making glucose(C6H12O6) and releasing oxygen(O2).
Glucose(C6H12O6) and oxygen(O2) are broken down and atoms are rearranged making water(H2O) and releasing carbon dioxide (CO2).
Methane (CH4) is combusted with molecules of oxygen (O2) making water(H2O) and releasing carbon dioxide(CO2).
Hydrogen molecules(H2) and oxygen molecules(O2) are broken down and rearranged making water (H2O).
What energy molecule is created as a result of rearranging the bonds of glucose during cellular respiration?
Light
ATP
DNA
Mitochondria
What is the difference between cellular respiration and anaerobic respiration?
anaerobic requires oxygen and cellular does not
anaerobic requires ATP and cellular does not
Cellular requires oxygen and anaerobic does not
Cellular requires ATP and anaerobic does not
Dr. Erin is studying the production of ATP in animal cells, concentrating her studies in the bicep muscle. Which organelle within the cell should Dr. Erin concentrate her studies?
Chloroplasts
Mitochondria
Nucleus
Stomata
Which part of the carbon cycle occurs when plant and animals die?
Decomposition
Cellular Respiration
Photosynthesis
Combustion
