The isotopes of an element differ in the number or neutrons whereas the number of protons or electrons of a neutral atom stays the same. The molar mass of the element is based on the percent abundances of different isotopes and the individual molar mass of each isotope.
Using this equation, we can take 25/(1.0 + 19) and find that it is equal to 1.25 moles.
Noble gases.
group 18. elements that are all unreactive .
fixed naming!
Answer:
The answer is "6.52 kg and 13.1 kg"
Explanation:
For point a:
Equation:
Calculating the amount of 
For point b:
Equation:
Calculating the amount of 
