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Chemistry Exam 1

Last updated almost 5 years ago
27 questions
4

Which of the following are considered safe in the lab? (Mark all that apply)

4

What piece of lab equipment is pictured?

4

The table shows repeated measurements by laboratory partners of the volume of oxygen released by a plant. Using a more advanced technique, their teacher measured the true volume of oxygen released by the plant as 0.311 mL. Which statement BEST describes the data?

4

Which of the following are physical properties? (Mark all that apply)

4

Sugar dissolves in warm water

4

A nail rusts

4

4

Students measured and recorded the density of 4 samples. Using the density column and data table shown above, which of the samples will most likely sink below the corn syrup?

4

A marble has a mass of 10 g and a volume of 20 mL. What is the density of the marble?

4

The ring in the image has a mass of 12 g. What is the density of the ring? (You have to measure the volume in the graduated cylinder before calculating the density)

4

The density of aluminum is 2.7 g/mL. A researcher finds a sample of aluminum with a volume of 20. mL. What mass of aluminum did he find?

4

Which of the following is NOT an element?

4

Which of the following correctly describes Iron (II) Oxide (FeO)?

4

One difference between a mixture and a compound is that

4

Which of the following is an example of a mixture?

4

Which of the following mixtures are homogeneous? (Mark all that apply)

4

To two significant figures, the measurement “0.0258 g” should be reported as

4

Which measurement has been expressed to three significant figures?

4

What is the measurement “0.000065 cm” written in scientific notation?

4

The measurement “2.0 x 10-2 L” is the same as which of the following?

2

Perform the indicated operations. Be sure to include the correct number of significant figures and units in your answer.

45.68 g + 3.2 g = _____________________

2

Perform the indicated operations. Be sure to include the correct number of significant figures and units in your answer.

(1.142 x 10-8 mm) x (8.5 x 10-4 mm) _____________________

2

Metric Conversions:

1000 mg = _______________ g

2

Metric Conversions:

60 cm = _______________ mm

2

Temperature Conversions:

Convert 154 K to °C ______________________

2

Temperature Conversions:

Convert -25 °C to K ______________________

8

Supporting Claims: Answer the question using the CER method. Be sure to clearly state your claim and justify your answer with evidence and reasoning. Please include a particle diagram(s) in your answer. (8 pts)

Question: Is burning a candle an example of a chemical change, physical change, or is it both?