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Experimental Chemistry and Introduction to Matter: Homework Help 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. You performed paper chromatography on some marker ink and found that one of the pigments had a retention factor of 0.25. The total distance the solvent traveled was 8.0 cm. How far did the pigment travel?

Question 2 2. Pure substances are further divided into elements and compounds. Which one best describes the rust found on a vehicle over time?

Question 3 3. If you are driving at a speed of 55.0 miles per hour, then what is your speed in meters per second? (Hint: 1 mile = 1,600 meters.)

Question 4 4. Which of the following is an example of a chemical change?

Question 5 5. Which of the following is NOT an example of a compound?

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Question 6 6. If you add 50.0 mL of water to a beaker containing 22 mL of water, then how much water do you have in the beaker?

Question 7 7. Simge's guinea pig weighs exactly 560. grams. Which of the following most accurately expresses the weight of Simge's guinea pig in scientific notation?

Question 8 8. Both gases and liquids:

Question 9 9. Which of the following changes to sugar is an example of a physical change?

Question 10 10.

Which of the following are physical changes?

1. melting ice

2. boiling water

3. magnetizing a pin

4. cooking an egg

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Question 11 11. Which of the following are arranged from smallest unit to largest unit?

Question 12 12. Which of the following is a physical change?

Question 13 13. Which of the following is the most heterogeneous mixture?

Question 14 14. Which of the following is a conversion factor?

Question 15 15. What is the density of a solid that has a mass of 9.2 grams and a volume of 12.3 cm^3? Would this object float or sink in water?

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Question 16 16. Which feature of the evaporating dish makes it effective in the evaporation process?

Question 17 17. What is the purpose of processing a substance with a mortar and pestle?

Question 18 18. The ability of iron to react to oxygen is an example of _____

Question 19 19.

The area of a rectangle can be found by multiplying its length by its width. What is the area of a rectangle that is 5.6 cm in length and 9.24 cm wide?

Report your answer with the correct number of significant figures.

Question 20 20. Use dimensional analysis to convert 4 days into seconds.

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Question 21 21. Homogeneous mixtures are also called

Question 22 22. Which is a slow way to separate solid sugar from a solution of sugar water?

Question 23 23. How many significant figures are in 54,050?

Question 24 24. The density of mercury is 13.6 g/mL. What is its density in lbs/L? (Hint: 1 lb = 0.454 kg)

Question 25 25. Alcohol and water are best separated from one another by:

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Question 26 26. What is the mass of a liquid with a density of 2.12 g/mL and a volume of 53.0 mL (to the nearest gram)?

Question 27 27. _____ properties of matter can be determined without changing composition, while _____ properties of matter must change the composition of matter.

Question 28 28. When heating a solution, a _____ is the best option for highly flammable substances while a _____ is best when heating to extremely high temperatures.

Question 29 29.

An empty container has a mass of 62.000 grams. You fill it with 24.6 mL of a liquid. The final mass of the container is 81.34 grams. What is the density of the liquid to the correct number of significant figures?

(density of the liquid = mass of the liquid divided by the volume of liquid)

Question 30 30. One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?

Experimental Chemistry and Introduction to Matter: Homework Help 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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