Question

calculate the relative atomic mass of gallium to two decimal places. before you do the calculation, make a prediction based on the mass and the percent abundance of the isotopes. (0.5 points)
isotope\tabundance (%)
$^{69}$ga\t60.10
$^{71}$ga\t39.90
enter your answer

Explanation:

Step1: Convert percentages to decimals

$60.10\% = 0.6010$, $39.90\%=0.3990$

Step2: Calculate contribution of each isotope

Contribution of $^{69}Ga$: $69\times0.6010 = 41.469$
Contribution of $^{71}Ga$: $71\times0.3990=28.329$

Step3: Calculate relative atomic mass

$41.469 + 28.329=69.798\approx69.80$

Answer:

$69.80$