Feb 5 Chem Quiz
Review of moles
Questions and Answers
- 1.
What is the molar mass of CH4?
- A.
12 g/mol
- B.
24g/mol
- C.
20 g/mol
- D.
16 g/mol
- E.
None of the above
Correct Answer
D. 16 g/molExplanation
The molar mass of CH4 is 16 g/mol because carbon has a molar mass of 12 g/mol and hydrogen has a molar mass of 1 g/mol. Since there are four hydrogen atoms in CH4, the total molar mass is 12 g/mol + 4 g/mol = 16 g/mol.Rate this question:
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- 2.
A + B -> AB represents which type of reaction?
- A.
Synthesis
- B.
Decomposition
- C.
Single-replacement
- D.
Double-replacement
- E.
Combustion
Correct Answer
A. SynthesisExplanation
The given chemical equation A + B -> AB represents a synthesis reaction. In a synthesis reaction, two or more reactants combine to form a single product. In this case, the reactants A and B combine to form the product AB.Rate this question:
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- 3.
A bicycle mechanic has 10 frames and 16 wheels in the shop. How many complete bicycles can he assemble using these parts?
- A.
2
- B.
4
- C.
6
- D.
8
- E.
10
Correct Answer
D. 8Explanation
The bicycle mechanic can assemble 8 complete bicycles using the 10 frames and 16 wheels in the shop. Each bicycle requires 1 frame and 2 wheels. Since there are only 10 frames available, the mechanic can assemble a maximum of 10 bicycles. However, since each bicycle requires 2 wheels, a total of 20 wheels would be needed for all 10 bicycles. Since there are only 16 wheels available, the mechanic can only assemble 8 complete bicycles.Rate this question:
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- 4.
A recipe calls for one cup of milk and 4 eggs. If you want to triple the recipe, how many eggs do you need?
- A.
3 cups
- B.
12 eggs
- C.
12 cups
- D.
3 eggs
Correct Answer
B. 12 eggsExplanation
If the recipe calls for one cup of milk and 4 eggs, and we want to triple the recipe, we need to multiply the number of eggs by 3. Therefore, 4 eggs multiplied by 3 equals 12 eggs. So, if we want to triple the recipe, we will need 12 eggs.Rate this question:
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- 5.
A recipe calls for 1 cup of milk and 4 eggs. If you only have 2 eggs, how much milk should you use?
- A.
1 cup
- B.
2 cups
- C.
1/2 cup
- D.
4 cups
Correct Answer
C. 1/2 cupExplanation
If the recipe calls for 4 eggs and you only have 2 eggs, it means you have half of the required amount of eggs. Therefore, it would make sense to also use half of the required amount of milk, which is 1 cup. Hence, the correct answer is 1/2 cup.Rate this question:
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- 6.
The 1 cup milk/ 4 egg recipe produces 12 cupcakes. How many cupcakes would it produce if you use 2 cups of milk and 8 eggs?
- A.
12
- B.
24
- C.
36
- D.
2
Correct Answer
B. 24Explanation
If the original recipe produces 12 cupcakes using 1 cup of milk and 4 eggs, then doubling the amount of milk and eggs would also double the number of cupcakes produced. Therefore, using 2 cups of milk and 8 eggs would produce 24 cupcakes.Rate this question:
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Mar 21, 2023Quiz Edited by
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Feb 01, 2010Quiz Created by
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