Deck 2: Evidence Collection and Preservation

Question 1

Select the metric prefix for micro.

A) m
B) M
C) µ
D) mi

Answer 1

µ

Question 2

Identify each of the following as either a chemical property or a physical property.

A) brittleness _____
B) malleability _____
C) toxicity _____
D) viscosity _____

Answer 2

physical; physical; chemical; physical

Question 3

Rewrite the number 0.00324010 in scientific notation, and round the answer to contain 4 significant figures.

Answer 3

3.240 × 10^-3

Question 4

Select the number that corresponds to 5.4801 × 10^-3 written in decimal notation.

A) 5.4801
B) 0.0054801
C) 0.054801
D) 54801
E) 548.01

Question 5

Cyanide poisoning can be deadly at blood levels of 3 mg/L. What is this dosage in g/mL?

Question 6

Use the table to answer the following question.

A sample of glass is recovered from a crime scene. It is determined that the glass has a softening point in the range of 690°C to 720°C. The density of the sample is determined to be 2.19 g/mL. The type of glass is _______.

Question 7

Using the correct number of significant figures, solve 32.5 × 0.0025 ÷ 2.900 = _______

Question 8

Convert 24.21 m/s to mi/hr.

Question 9

Calculate the mass, in kg, of 76.47 L of a solution with a density of 1.54 g/mL.

Question 10

Identify each of the following as either a chemical change or a physical change.

A) burning charcoal _____
B) caramelizing sugar _____
C) melting chocolate _____
D) formation of acid rain _____

Question 11

Convert 192,000 g to mg.

Question 12

For each of the following, write the number of significant figures.

A) 0.510400 _____
B) 12,000 _____
C) 0.000012402 _____
D) 2,908.0 _____

Question 13

Using the correct number of significant figures, solve 21.056 + 32.0008 + 0.002 = _______

Question 14

Use the table to answer the following question.
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A 13.58-g piece of glass was recovered from a crime scene. When the glass was submerged in a graduated cylinder, the volume increased from 27.89 mL to 32.41 mL.

A) The density of the glass is ________.
B) This type of glass is most likely _______.

Question 15

Select the metric prefix that corresponds to the decimal equivalent of 1,000,000,000.

A) G
B) k
C) M
D) D
Enter the appropriate word(s) to complete the statement.

Question 16

Select the number that corresponds to 785.0 written in scientific notation.

A) 7.85 × 10²
B) 7.85 × 10^-2
C) 7.850 × 10²
D) 7.850 × 10^-2

Question 17

A student is trying to determine the density of an unknown metal object. The mass of the object is 15.34
g. When the object was submerged in a graduated cylinder, the volume of the cylinder rose from 17.25 mL to 19.02 mL. What is the density of the metal?

Question 18

An experiment calls for 26.4 g of ethyl alcohol. The density of ethyl alcohol is 0.789 g/mL. Calculate the volume, in mL, of ethyl alcohol that should be used in this experiment.

Question 19

Using the correct number of significant figures, solve (19.3209 - 14.20) * 100.0 = _______