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Measurement in Chemistry Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. A piece of aluminum foil has a mass of 27 grams. About how many atoms does this contain?

Question 2 2. Based on Avogadro's number, which of the following is NOT true?

Question 3 3. A piece of pencil graphite (made of carbon atoms) has a mass of 0.12 grams. How many moles of carbon atoms are in the lead?

Question 4 4. A piece of copper wire contains 5 moles of copper atoms. What is its mass?

Question 5 5. MgCl2 and NaCl are both salts that are used to treat roads. Which salt will have the greatest effect on the freezing point and why?

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Question 6 6. Which of the following is NOT an example of a colligative property?

Question 7 7. What is the m in the equation for measuring freezing point depression (ΔT = - i Kf m)?

Question 8 8. What is the freezing point of a solution made by dissolving 100.0 g of sucrose (C12 H22 O11 ) into 950 g of water, where the Kf of water = 1.86 C/m, and the molar mass of sucrose = 342.2 g/mol?

Question 9 9. When using a buret, you can determine the amount of liquid dispensed with this simple math equation.

Question 10 10. You should do this when taking a liquid volume reading.

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Question 11 11. This curved surface is created because liquid clings to the edge of a graduated cylinder.

Question 12 12. If you want to accurately measure 300 mL of liquid, you might want to use this cylindrical container with markings on the side.

Question 13 13. An expandable container is holding 0.75 moles of argon with a volume of 5.0 L. Assuming the temperature and pressure are held constant, how many moles of argon would be needed to increase the volume to 7.0 L?

Question 14 14. Avogadro's law shows the relationship between _____.

Question 15 15. A container has a volume of 53.9 L. Assuming it is at STP, how many moles of gas particles does it contain?

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Question 16 16. Standard temperature and standard pressure refer to:

Question 17 17. How many grams of CH3 OH is needed to make a 0.244 M solution in 400 mL of water?

Question 18 18. What is the molarity of a solution made by dissolving 26.42 g of (NH4) 2 SO4 in enough water to make 50 mL of solution?

Question 19 19. What is molality?

Question 20 20. What is molarity?

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Question 21 21. Which best describes weight?

Question 22 22. How much does a 1-kg object weigh on Earth?

Question 23 23. What is the standard unit of weight in physics?

Question 24 24. Which object will have the most mass?

Question 25 25. What is meant by the term molar volume?

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Question 26 26. You conduct an experiment that requires the creation of an ammonia solution. You do this by reacting 50.0 L of nitrogen gas with excess hydrogen gas at STP to create ammonia gas using the Haber process given by the following reaction: N2 (g) + 3H2 (g) → 2NH3 (g). Assuming the reaction had 100% yield, you then bubble the ammonia into 5.0 L of water. What is the molarity of the resulting ammonia solution?

Question 27 27. How many moles of solute are in a 0.50 L solution of 3.0 molarity?

Question 28 28. You are given the chemical equation 2K + 2HCl --> 2KCl + H2. If 2 liters of 0.2M HCl are used, calculate the volume of hydrogen produced at STP.

Question 29 29. A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass?

Question 30 30. Which of the following is the best definition of a colligative property?

Measurement in Chemistry Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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