Quiz 2 - CEGR 338

Quiz 2 - CEGR 338

University

11 Qs

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Quiz 2 - CEGR 338

Quiz 2 - CEGR 338

Assessment

Quiz

Engineering

University

Practice Problem

Medium

Created by

Adriélli Bonfanti Pagnoncelli

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11 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The general formula for alkanes is CₙH₂ₙ₊₂. What does n represent in this formula?

The number of hydrogen atoms in the molecule

The number of carbon atoms in the molecule

The molecular mass of the alkane

The number of bonds in the molecule

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If N = 5, which corresponds to pentane, what is the molecular formula of pentane?

C₅H₈

C₅H₁₀

C₅H₁₂

C₅H₁₄

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Balance the following combustion reaction:

C6H14+O2→CO2+H2O

2C6​H14​+19O2​ → 6CO2​+14H2​O

2C6​H14​+24O2​ → 12CO2​+7H2​O

2C6​H14​+19O2​ → 12CO2​+14H2​O

2C6​H14​+19O2​ → 6CO2​+7H2​O

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Calculate the molar mass of hexane (C₆H₁₄)

Molar mass:

  • Carbon (C) = 12.01 g/mol

  • Hydrogen (H) = 1.008 g/mol

72.06 g/mol

86.17 g/mol

100.12 g/mol

58.12 g/mol

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Convert 100 g of hexane (C₆H₁₄) to moles.
(Molar mass of hexane = 86.17 g/mol)

0.86 moles

1.16 moles

1.39 moles

1.92 moles

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Using the balanced equation you balanced before:

2 C₆H₁₄ + 19 O₂ → 12 CO₂ + 14 H₂O

How many moles of oxygen (O₂) are required to burn 1.16 moles of hexane (C₆H₁₄)?

9.50 moles O₂

10.25 moles O₂

11.03 moles O₂

12.50 moles O₂

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Convert 11.03 moles of oxygen (O₂) to grams. The molar mass of O₂ is 32.00 g/mol.

321.0 g

353.0 g

288.5 g

375.2 g

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