English *
Write sentences in present perfect simple tense.
1. They / play / football
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2. He / speak / English
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3. I / write / a poem
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4. We / not / wash / the car
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5. Nancy / not / meet / her friends
Form questions using past prefect simple tense.
1. They / finish / their homework
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2. She / visit / her friend
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3. The maid / clean / the house
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4. He / drive / the van
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5. You / ever / write / a poem
Answers
Answer:
A solution of acetic acid (CH3COOH), methanol (CH3OH), and water is prepared such that the mole fraction of acetic acid is 0.01335, and the mole fraction of methanol is 0.03288. The density of the solution is measured to be 0.9889 g/mL. What is the molarity (in M) of acetic acid in this solutionA solution of acetic acid (CH3COOH), methanol (CH3OH), and water is prepared such that the mole fraction of acetic acid is 0.01335, and the mole fraction of methanol is 0.03288. The density of the solution is measured to be 0.9889 g/mL. What is the molarity (in M) of acetic acid in this solutionA solution of acetic acid (CH3COOH), methanol (CH3OH), and water is prepared such that the mole fraction of acetic acid is 0.01335, and the mole fraction of methanol is 0.03288. The density of the solution is measured to be 0.9889 g/mL. What is the molarity (in M) of acetic acid in this solutionA solution of acetic acid (CH3COOH), methanol (CH3OH), and water is prepared such that the mole fraction of acetic acid is 0.01335, and the mole fraction of methanol is 0.03288. The density of the solution is measured to be 0.9889 g/mL. What is the molarity (in M) of acetic acid in this solutionA solution of acetic acid (CH3COOH), methanol (CH3OH), and water is prepared such that the mole fraction of acetic acid is 0.01335, and the mole fraction of methanol is 0.03288. The density of the solution is measured to be 0.9889 g/mL. What is the molarity (in M) of acetic acid in this solutionA solution of acetic acid (CH3COOH), methanol (CH3OH), and water is prepared such that the mole fraction of acetic acid is 0.01335, and the mole fraction of methanol is 0.03288. The density of the solution is measured to be 0.9889 g/mL. What is the molarity (in M) of acetic acid in this solution
Answer:
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Explanation:
1) They have played football.
2) He has spoken English.
3) I have written a poem.
4) We have not washed the car / We haven't washed the car.
5) Nancy has not met her friends / Nancy hasn't met her friends.
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1) Have they finished their homework?
2) Has she visited her friend?
3) Has the maid cleaned the house?
4) Has he driven the van?
5) Have you ever written a poem?