Quiz 2 Practice (Modules 4 & 5) Attempt review PDF

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Dashboard / OSCI18 Fundamentals of Chemistry (OUA) (oua3, 2020) / Module 5 Chemical Compos / Quiz 2 Practice (Modules 4 & 5)

Started on State Completed on Time taken

Wednesday, 30 September 2020, 5:27 PM Finished Wednesday, 30 September 2020, 5:50 PM 23 mins 1 sec

Question 1 Correct

How would the number 0.003344 be written in scientic notation?

Mark 1.00 out of 1.00

Select one: 3.344 x 102 3.344 x 103 3.344 x 10-1 3.344 x 10-3 

The correct answer is: 3.344 x 10-3

Question 2 Correct

The correct decimal representation of 1.201 x 10 –7 is:

Mark 1.00 out of 1.00

Select one: 0.0001201 1201.000 0.0000001201  12010000

The correct answer is: 0.0000001201

Question 4 Correct Mark 1.00 out of 1.00

How many signicant gures are represented by the following number that is writte 2.5 x 103

Select one: 0 1 2 3

The correct answer is: 2

Question 5 Correct Mark 1.00 out of 1.00

Determine the answer for the calculation below with correct number of signicant  1.2 x 1.79 = ________

Select one: 2.15 2.1  2.2 2.148

The correct answer is: 2.1

Question 6 Correct Mark 1.00 out of 1.00

Determine the answer to the following calculation with correct number of signican 2.02 + 8.102 - 0.0297 = ________

Select one: 10.0923

Question 7 Correct

When rounding the number 2.348615 to 3 signicant gures, what is the correct val

Mark 1.00 out of 1.00

Select one: 2.35  2.34 2.36 2.350

The correct answer is: 2.35

Question 8 Correct

How many microliters (μL) are in 41.0 mL?

Mark 1.00 out of 1.00

Select one: 4.10 x 104  0.041 4.1 x 103 4.1 x 1010

The correct answer is: 4.10 x 104

Question 9 Correct Mark 1.00 out

What is the volume of 13.5 g of a liquid that has a density of 0.892 g/mL?

of 1.00

Select one: 14.8 mL 11.4 mL 13.6 mL 15.1 mL 

Question 10 Correct Mark 1.00 out

Calculate the molar mass of calcium nitrate (Ca(NO 3) 2).

of 1.00

Select one: 132.10 g mol–1 136.03 g mol–1 164.10 g mol–1  102.09 g mol–1

The correct answer is: 164.10 g mol–1

Question 11 Correct

How many moles of potassium (K, molar mass 39.1 g mol-1) are in a 117.3 g sample

Mark 1.00 out of 1.00

Select one: 39.10 0.3300 3.000  3.790

The correct answer is: 3.000

Question 12 Correct Mark 1.00 out

How many molecules of nitrogen monoxide (NO, molar mass 30.01 g mol -1) are in a

of 1.00

Select one: 5.86 x 1023 4.51 x 1023  4.06 x 1023 7.33 x 1023

Question 13 Correct Mark 1.00 out

One mole of ammonium nitrate (NH4NO3) contains:

of 1.00

Select one: 1 mole of nitrogen 2 moles of oxygen 2 moles of nitrogen  3 moles of hydrogen

The correct answer is: 2 moles of nitrogen

Question 14 Correct Mark 1.00 out of 1.00

What is the mass (in grams) of 1.95 moles of water (H 2O, molar mass 18.01 g mol-1)?

Select one: 18.02 9.24 35.1  6.022 x 1023

The correct answer is: 35.1

Question 15 Correct Mark 1.00 out

What is the mass percent of chlorine (Cl) in hydrochloric acid (HCl)?

of 1.00

Select one: 35.5 97.2  2.8 70.1

Question 16 Correct

Determine the empirical formula of a compound containing 26.68 % carbon, 2.24 %

Mark 1.00 out of 1.00

Select one: C0.5H0.5O1 CHO C2H2O4 CHO2 

The correct answer is: CHO2

Question 17 Correct

What is the molecular formula of a compound with molar mass 30.04 g mol–1 and e

Mark 1.00 out of 1.00

Select one: NH N 2H 2  N 4H 4 N 2H 6

The correct answer is: N 2H 2

Answers for Textbook Questions Module 5

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