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Get Full Access to Introductory Chemistry - 5 Edition - Chapter 5 - Problem 100p
Get Full Access to Introductory Chemistry - 5 Edition - Chapter 5 - Problem 100p

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# Name each compound and calculate its formula mass.(a) Al2(SO4)3(b) P2O3(c) HClO(aq)(d)

ISBN: 9780321910295 34

## Solution for problem 100P Chapter 5

Introductory Chemistry | 5th Edition

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Problem 100P

Problem 100P

Name each compound and calculate its formula mass.

(a) Al2(SO4)3

(b) P2O3

(c) HClO(aq)

(d) Cr(C2H3O2)3

Step-by-Step Solution:
Step 1 of 3

Solution 100P

Here, we are going to write the name and calculate the formula mass.

Formula mass is the average mass of the molecule of a compound.

Formula mass of a molecule can be calculated by using the following formula.

Formula mass = (no of atoms of the element ) x (atomic mass of 1st element) + (no of atoms of the element ) x (atomic mass of 2nd  element) +...

(a) Al2(SO4)3

The chemical name of the compound is Aluminium sulfate.

Formula mass

=  2 x(atomic mass of Al)+ 3 x(atomic mass of S )+12 (atomic mass of O)

= 1 x 26.98 amu +3 x 32.065 amu + 12 x 16.00 amu

=53.96 amu + 96.195 amu + 192 amu

= 342.155 amu

The formula mass of Al2(SO4)3 is 342.15 amu.

(b) P2O3

The chemical name of the compound is Diphosphorus Trioxide.

Formula mass

=  2 x(atomic mass of P)+ 3 x(atomic mass of O )

= 2 x 30.97 amu +3 x 16.00 amu

=61.94 amu + 48 amu

=109.94 amu

The formula mass of P2O3 is 109.94 amu.

(c) HClO(aq)

The chemical name of the compound is Hypochlorous acid.

Formula mass

=  1x(atomic mass of H)+ 1 x(atomic mass of Cl )+ 1 x(atomic mass of O)

= 1 x 1.008 amu +1 x 35.45 amu +1 x 16.00 amu

=1.008 +35.45 +16

=52.458 amu

The formula mass of HClO(aq) is 52.46 amu.

(d) Cr(C2H3O2)3

The chemical name of the compound is Chromium(III)acetate.

Formula mass

=  1x(atomic mass of Cr)+ 6 x(atomic mass of C )+ 9 x(atomic mass of H)+6 x(atomic mass of O)

= 1 x 51.996 amu +6 x 12.01 amu + 9x 1.008 amu + 6 x 16.00 amu

=51.996 amu + 72.06 amu + 9.072 amu + 96 amu

=229.128 amu

The formula mass of Cr(C2H3O2)3 is 229.128 amu.

Step 2 of 3

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Name each compound and calculate its formula mass.(a) Al2(SO4)3(b) P2O3(c) HClO(aq)(d)