Question

directions: drag the number of isotope atoms indicated below into the black box in the simulation.
number of atoms for each isotope:

• hydrogen - 1 = 8 atoms
• hydrogen - 2 = 2 atoms

answer the following questions based on the percent composition and average atomic mass data:

1. what is the percent composition of hydrogen - 1?

% only type a number!

1. what is the percent composition of hydrogen - 2?

% only type a number!

1. what is the average atomic mass of the two isotopes?

amu only type a number, round to 2 decimal places!

Explanation:

Step1: Calculate total number of atoms

Total atoms = Hydrogen - 1 atoms + Hydrogen - 2 atoms.
Total atoms = \(8 + 2=10\) atoms.

Step2: Calculate percent composition of Hydrogen - 1

Percent composition formula: \(\text{Percent}=\frac{\text{Number of specific isotope atoms}}{\text{Total atoms}}\times100\).
For Hydrogen - 1: \(\frac{8}{10}\times100 = 80\%\).

Step3: Calculate percent composition of Hydrogen - 2

Using the same formula.
For Hydrogen - 2: \(\frac{2}{10}\times100=20\%\).

Step4: Calculate average atomic mass

Average atomic mass formula: \(\text{Average atomic mass}=(\text{Mass of isotope 1}\times\text{Percent composition of isotope 1})+(\text{Mass of isotope 2}\times\text{Percent composition of isotope 2})\).
Mass of Hydrogen - 1 is \(1\) amu, mass of Hydrogen - 2 is \(2\) amu.
\((1\times0.8)+(2\times0.2)=0.8 + 0.4=1.20\) amu.

Answer:

1. \(80\)
2. \(20\)
3. \(1.20\)