Question

Calculate the average atomic mass of the element Hydrogen (H) using the following data:

Hydrogen-1 99.0%
Hydrogen-2 0.80%
Hydrogen-3 0.20%
A) 1.1 amu
B) 1.0 amu
C) 1.01 amu
D) 0.99 amu

Answer 1

To calculate the average atomic mass of Hydrogen, consider the mass of each isotope and its abundance. Apply the formula [Hydrogen-1 mass x Hydrogen-1 abundance] + [Hydrogen-2 mass x Hydrogen-2 abundance] + [Hydrogen-3 mass x Hydrogen-3 abundance] = Average atomic mass.

Step-by-step explanation:

To calculate the average atomic mass of an element, we need to consider the mass of each isotope and its abundance. In the case of Hydrogen (H), we have three isotopes: Hydrogen-1, Hydrogen-2, and Hydrogen-3. Using the given data:

• Hydrogen-1: 99.0% abundance
• Hydrogen-2: 0.80% abundance
• Hydrogen-3: 0.20% abundance

We can calculate the average atomic mass as follows:

[Hydrogen-1 mass x Hydrogen-1 abundance] + [Hydrogen-2 mass x Hydrogen-2 abundance] + [Hydrogen-3 mass x Hydrogen-3 abundance] = Average atomic mass

Plugging in the values, we get:

[1 amu x 0.99] + [2 amu x 0.008] + [3 amu x 0.002] = 1.01 amu

Therefore, the average atomic mass of Hydrogen is 1.01 amu.