Question

What is the average atomic mass of 12 amu 98%, 13 amu 1.3%, and 14 amu 0.7%?

Answer 1

To calculate the average atomic mass, we need to consider the mass of each isotope and its relative abundance.

Given the following information:

• Isotope 1: Mass = 12 amu, Relative Abundance = 98%
• Isotope 2: Mass = 13 amu, Relative Abundance = 1.3%
• Isotope 3: Mass = 14 amu, Relative Abundance = 0.7%

We can calculate the average atomic mass using the following formula:

Average atomic mass = (Mass of isotope 1 × Relative abundance of isotope 1) + (Mass of isotope 2 × Relative abundance of isotope 2) + (Mass of isotope 3 × Relative abundance of isotope 3) + ...

Using the given information, we can calculate the average atomic mass as follows:

Average atomic mass = (12 amu × 0.98) + (13 amu × 0.013) + (14 amu × 0.007)

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