An Introduction to Physical Science
An Introduction to Physical Science
14th Edition
ISBN: 9781305079137
Author: James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher: Cengage Learning
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Chapter 12, Problem 3E

Calculate (to the nearest 0.1 u) the formula mass of these compounds.

  1. (a) carbon dioxide, CO2
  2. (b) methane, CH4
  3. (c) sodium phosphate, Na3PO4

(a)

Expert Solution
Check Mark
To determine
The formula mass of carbon dioxide (CO2) .

Answer to Problem 3E

The formula mass of carbon dioxide (CO2) is 44.0 u .

Explanation of Solution

Formula mass of any compound is given as the sum of the atomic masses of the constituent atoms given in the chemical formula of a substance. Formula mass and atomic mass are abbreviated as FM and AM respectively.

The formula mass of carbon dioxide (CO2) is given as,

FM of (CO2)=(AM of carbon atom)+(2×AM of oxygen atom) (1)

Atomic mass (AM) of carbon atom is 12.0 u .

Atomic mass (AM) of oxygen atom is 16.0 u .

Substitute 12.0 u for AM of carbon atom and 16.0 u for AM of oxygen atom in

equation (1).

FM of CO2=(12.0 u)+(2×16.0 u)=44.0 u

Conclusion:

Therefore, the formula mass of carbon dioxide (CO2) is 44.0 u .

(b)

Expert Solution
Check Mark
To determine
The formula mass of methane (CH4) .

Answer to Problem 3E

The formula mass of methane (CH4) is 16.0 u .

Explanation of Solution

Formula mass of any compound is given as the sum of the atomic masses of the constituent atoms given in the chemical formula of a substance. Formula mass and atomic mass are abbreviated as FM and AM respectively.

The formula mass of methane (CH4) is given as,

FM of (CH4)=(AM of carbon atom)+(4×AM of hydrogen atom) (2)

Atomic mass (AM) of carbon atom is 12.0 u .

Atomic mass (AM) of hydrogen atom is 1.0 u .

Substitute 12.0 u for AM of carbon atom and 1.0 u for AM of hydrogen atom in

equation (2).

FM of CH4=(12.0 u)+(4×1.0 u)=16.0 u

Conclusion:

Therefore, the formula mass of methane (CH4) is 16.0 u .

(c)

Expert Solution
Check Mark
To determine
The formula mass of sodium phosphate (Na3PO4) .

Answer to Problem 3E

The formula mass of sodium phosphate (Na3PO4) is 164.0 u .

Explanation of Solution

Formula mass of any compound is given as the sum of the atomic masses of the constituent atoms given in the chemical formula of a substance. Formula mass and atomic mass are abbreviated as FM and AM respectively.

The formula mass of sodium phosphate (Na3PO4) is given as,

FM of (Na3PO4) =[(3×AM of sodium atom)+(AM of phosphorous atom)+(4×AM of oxygen atom)] (3)

Atomic mass (AM) of sodium atom is 23.0 u .

Atomic mass (AM) of phosphorus atom is 31.0 u .

Atomic mass (AM) of oxygen atom is 16.0 u .

Substitute 23.0 u for AM of sodium atom 31.0 u for AM of phosphorous atom and 16.0 u for AM of oxygen atom in equation (3).

FM of Na3PO4 = (3×23.0 u)+(31.0u)+(4×16.0 u)=164.0 u

Conclusion:

Therefore, the formula mass of sodium phosphate (Na3PO4) is 164.0 u .

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Chapter 12 Solutions

An Introduction to Physical Science

Ch. 12.4 - Prob. 2PQCh. 12.4 - Prob. 12.4CECh. 12.4 - Prob. 12.5CECh. 12.5 - Prob. 1PQCh. 12.5 - Prob. 2PQCh. 12.5 - Prob. 12.6CECh. 12.6 - Is PCl3 ionic or covalent in bonding? What about...Ch. 12.6 - Prob. 12.8CECh. 12.6 - Boron trifluoride, BF3, is an exception to the...Ch. 12.6 - Prob. 1PQCh. 12.6 - Prob. 2PQCh. 12 - Prob. AMCh. 12 - Prob. BMCh. 12 - Prob. CMCh. 12 - Prob. DMCh. 12 - Prob. EMCh. 12 - Prob. FMCh. 12 - Prob. GMCh. 12 - Prob. HMCh. 12 - Prob. IMCh. 12 - Prob. JMCh. 12 - Prob. KMCh. 12 - Prob. LMCh. 12 - Prob. MMCh. 12 - Prob. NMCh. 12 - Prob. OMCh. 12 - Prob. PMCh. 12 - Prob. QMCh. 12 - Prob. RMCh. 12 - Prob. SMCh. 12 - Prob. 1MCCh. 12 - Prob. 2MCCh. 12 - Prob. 3MCCh. 12 - Prob. 4MCCh. 12 - Prob. 5MCCh. 12 - Prob. 6MCCh. 12 - Prob. 7MCCh. 12 - Prob. 8MCCh. 12 - Prob. 9MCCh. 12 - Prob. 10MCCh. 12 - Sodium reacts with a certain element to form a...Ch. 12 - Prob. 12MCCh. 12 - Prob. 13MCCh. 12 - Carbon is a Group 4A element. How many covalent...Ch. 12 - How many shared pairs of electrons are in an...Ch. 12 - Prob. 16MCCh. 12 - Prob. 17MCCh. 12 - Prob. 18MCCh. 12 - Prob. 1FIBCh. 12 - Prob. 2FIBCh. 12 - Prob. 3FIBCh. 12 - Prob. 4FIBCh. 12 - Prob. 5FIBCh. 12 - Prob. 6FIBCh. 12 - Prob. 7FIBCh. 12 - The formula of an ionic compound of a Group 1A...Ch. 12 - Prob. 9FIBCh. 12 - Prob. 10FIBCh. 12 - Prob. 11FIBCh. 12 - Prob. 12FIBCh. 12 - Prob. 1SACh. 12 - Prob. 2SACh. 12 - Prob. 3SACh. 12 - Prob. 4SACh. 12 - Prob. 5SACh. 12 - Prob. 6SACh. 12 - Prob. 7SACh. 12 - Prob. 8SACh. 12 - Prob. 9SACh. 12 - Prob. 10SACh. 12 - Prob. 11SACh. 12 - Prob. 12SACh. 12 - Prob. 13SACh. 12 - Prob. 14SACh. 12 - Prob. 15SACh. 12 - Prob. 16SACh. 12 - Prob. 17SACh. 12 - Prob. 18SACh. 12 - Prob. 19SACh. 12 - Prob. 20SACh. 12 - Prob. 21SACh. 12 - Prob. 22SACh. 12 - Prob. 23SACh. 12 - Prob. 24SACh. 12 - Prob. 25SACh. 12 - A covalent bond in which the electron pair is...Ch. 12 - Could a molecule composed of two atoms joined by a...Ch. 12 - Explain how a polyatomic ion such as carbonate...Ch. 12 - Prob. 29SACh. 12 - Prob. 30SACh. 12 - Prob. 31SACh. 12 - State the short general principle of solubility,...Ch. 12 - Prob. 33SACh. 12 - Prob. 1VCCh. 12 - You decide to have hot dogs for dinner. In the...Ch. 12 - Why cant we destroy bothersome pollutants by just...Ch. 12 - Prob. 3AYKCh. 12 - When you use a bottle of vinegar-and-oil salad...Ch. 12 - Prob. 5AYKCh. 12 - Prob. 6AYKCh. 12 - Prob. 1ECh. 12 - An antacid tablet weighing 0.942 g contained...Ch. 12 - Calculate (to the nearest 0.1 u) the formula mass...Ch. 12 - Calculate (to the nearest 0.1 u) the formula mass...Ch. 12 - Find the percentage by mass of Cl in MgCl2 if it...Ch. 12 - Prob. 6ECh. 12 - Prob. 7ECh. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - Prob. 11ECh. 12 - Prob. 12ECh. 12 - Prob. 13ECh. 12 - Prob. 14ECh. 12 - Prob. 15ECh. 12 - Write the Lewis symbols and structures that show...Ch. 12 - Prob. 17ECh. 12 - Prob. 18ECh. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Referring only to a periodic table, give the...Ch. 12 - Referring only to a periodic table, give the...Ch. 12 - Prob. 23ECh. 12 - Draw the Lewis structure for formaldehyde, H2CO, a...Ch. 12 - Prob. 25ECh. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - Prob. 28ECh. 12 - Use arrows to show the polarity of each bond in...Ch. 12 - Use arrows to show the polarity of each bond in...Ch. 12 - Prob. 31ECh. 12 - Prob. 32E
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