Chem Practice Exam 1 PDF

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Test practice for exam n0.2...

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Review Test Submission: First practice exam – 2021 ...

2/20/21, 7(11 PM

Su Jin Kang

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2021 Spring Term (1) Chemistry I CHE 201 201L[27515] (Borough of Manhattan CC Course Materials

Review Test Submission: First practice exam

Review Test Submission: First practice exam

User

Su Jin Kang

Course

2021 Spring Term (1) Chemistry I CHE 201 201L[27515] (Borough of Manhattan CC)

Test

First practice exam

Started

2/20/21 6:28 PM

Submitted

2/20/21 7:03 PM

Due Date

2/22/21 7:00 PM

Status

Completed

Attempt Score

87.1 out of 100.5 points

Time Elapsed 35 minutes out of 1 hour

Question 1

3.35 out of 3.35 points

Which species contains 68 neutrons?

Question 2

0 out of 3.35 points

If shaded and unshaded spheres represent atoms of different elements, as shown in drawing (1), which drawings (2)-(4) represent the law of multiple proportions?

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Page 1 of 7

Review Test Submission: First practice exam – 2021 ...

Question 3

2/20/21, 7(11 PM

3.35 out of 3.35 points

The factor 10 corresponds to which prefix?

Question 4

3.35 out of 3.35 points

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. P= After performing the calculation, the student's calculator appeared as shown below: To the correct number of significant figures what is the value of P?

Question 5

3.35 out of 3.35 points

The correct formula of iron (III) bromide is ________.

Question 6

3.35 out of 3.35 points

Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?

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Page 2 of 7

Review Test Submission: First practice exam – 2021 ...

Question 7

2/20/21, 7(11 PM

3.35 out of 3.35 points

The law of constant composition applies to ________.

Question 8

3.35 out of 3.35 points

The correct name for MgF 2 is ________.

Question 9

3.35 out of 3.35 points

Which one of the following is often separated into its components by simple techniques such as filtering or decanting?

Question 10

3.35 out of 3.35 points

Which one of the following is not one of the postulates of Dalton's atomic theory?

Question 11

3.35 out of 3.35 points

The proper formula for the hydronium ion is ________.

Question 12

0 out of 3.35 points

How many significant figures should be retained in the result of the following calculation? 12.00000 × 0.9893 + 13.00335 × 0.0107

Question 13

3.35 out of 3.35 points

Round the following number to four significant figures and express the result in standard exponential notation: 229.613

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Page 3 of 7

Review Test Submission: First practice exam – 2021 ...

Question 14

2/20/21, 7(11 PM

3.35 out of 3.35 points

Osmium has a density of 22.6 g/cm 3. What volume (in cm 3) would be occupied by a 21.8 g sample of osmium?

Question 15

3.35 out of 3.35 points

Use the periodic table below to answer the following questions.

Which is the correct formula of the binary fluoride of element A?

Question 16

3.35 out of 3.35 points

Express the temperature, 275.18 K, in degrees Celsius.

Question 17

3.35 out of 3.35 points

Round the following number to four significant figures and express the result in standard exponential notation: 0.00222755

Question 18

3.35 out of 3.35 points

Convert 55 m 3 to liters.

Question 19

3.35 out of 3.35 points

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Page 4 of 7

Review Test Submission: First practice exam – 2021 ...

2/20/21, 7(11 PM

Which isotope has 36 electrons in an atom?

Question 20

3.35 out of 3.35 points

An object measuring 25.0 inches will have a length of ________ centimeters.

Question 21

3.35 out of 3.35 points

Which formula/name pair is incorrect?

Question 22

3.35 out of 3.35 points

Cathode rays are deflected away from a negatively charged plate because ________.

Question 23

3.35 out of 3.35 points

What group of elements does the shaded area in the following periodic table indicate?

Question 24

3.35 out of 3.35 points

A certain liquid has a density of 1.25 g/cm 3. Which drawing below most closely represents the volume of this liquid needed to obtain 5.00 g of the liquid?

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Page 5 of 7

Review Test Submission: First practice exam – 2021 ...

2/20/21, 7(11 PM

Question 25

3.35 out of 3.35 points

Silver has two naturally occurring isotopes with the following isotopic masses: Ar 106.90509

Ar 108.9047

The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is ________.

Question 26

3.35 out of 3.35 points

There are ________ electrons, ________ protons, and ________ neutrons in an atom of Xe.

Question 27

0 out of 3.35 points

To the correct number of significant figures, what is the temperature reading on the following Celsius thermometer?

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Review Test Submission: First practice exam – 2021 ...

Question 28

2/20/21, 7(11 PM

3.35 out of 3.35 points

What would be the volume of a box that measures 1.12 m ×

Question 29

×

?

0 out of 3.35 points

Which type of formula provides the most information about a compound?

Question 30

3.35 out of 3.35 points

Which one of the following is true about the liter? Saturday, February 20, 2021 7:03:50 PM EST

← OK

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