Tutor profile: Lauren H.
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Lauren H.
Former AP Chemistry Student and Current Chemistry Major
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Questions
Subject: Pre-Algebra
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Question:
What is 2^3?
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Lauren H.
Answer:
8. To find the answer without a calculator, multiply 2 by 2 (resulting in 4) by 2.
Subject: Basic Math
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Question:
Express 54/1000 as a decimal.
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Lauren H.
Answer:
0.054.
Subject: Basic Chemistry
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Question:
You have 17 grams of NaCl. How many moles of NaCl do you have?
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Lauren H.
Answer:
The answer is 0.291 moles. To solve this problem, first start out with what you are given. The question states that you have 17 grams of NaCl. Now identify what you are trying to find. The questions asks you to convert the 17 grams you were given to moles. Use the molar mass of NaCl (58.4g/mol) to convert. Divide 17 grams by 58.4 g/mol to be left with the number of moles.
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