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Tutor profile: Esther W.

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Esther W.
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Questions

Subject: Chemistry

TutorMe
Question:

If you dissolve 1 kilograms of sulfuric acid (H2SO4) into 2.50 L of water, what is the concentration?

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Esther W.
Answer:

1. Determine the molar mass of sulfuric acid (H2SO4) 2(1.008)+1(32.08)+4(15.999) = 98.056 g/mole of sulfuric acid 2. Convert kilograms to grams (1 kilograms of sulfuric acid) x (1000 grams/ 1 kilogram) = 1000 grams of sulfuric acid 3. Determine the moles of sulfuric acid in your sample. (1000 grams of sulfuric acid) x (1 mole sulfuric acid / 98.056 g sulfuric acid) = 10.198 moles sulfuric acid 4. Determine the concentration (M). M= mol/ L = (10.198 mole sulfuric acid / 2.5 L) = 4.08 M sulfuric acid

Subject: Basic Chemistry

TutorMe
Question:

What is combustion?

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Esther W.
Answer:

Combustion is the process of burning something with oxygen, releasing carbon dioxide and water vapor. An example of this would be the combustion of methane which is known as a natural gas.

Subject: Algebra

TutorMe
Question:

If you drive at the speed limit of 65 miles an hour, how many minutes does it take to drive to your destination that is 455 miles away?

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Esther W.
Answer:

1. Identify the rate (65 miles/ hour) 2. Set up your conversation. *Check to make sure your units cancel and the unit you want remains.* (455 miles) x (1 hour / 65 miles) 3. Solve for hours. (7 hours) 4. Convert to minutes. *Check to make sure your units cancel and the unit you want remains.* (7 hours) x (60 minutes / 1 hour) = 420 minutes

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