Question
75 % of mathrm(Cl) atoms have a mass number of 35, whilst the remaining 25 % ha / 1 mass number of 37. What is the relative atomic mass of chlorine? TIIAT CAN'T BE RIGHT 25.5 35.5 36 26 42
Answer
4.6
(333 Votes)
Gilbert
Master · Tutor for 5 years
Answer
B. 35.5
Explanation
The question is about determining the relative atomic mass of chlorine. The relative atomic mass is a weighted average mass of the atoms in a sample, relative to carbon 12. It's calculated by summing the product of the mass of each isotope and its relative abundance, then dividing by the sum of the relative abundances. Here, 75% of chlorine atoms have a mass number of 35 and 25% have a mass number of 37. Applying these percentages and masses to the large,weighted average formula, we will have the formula [(75/100)*35 + (25/100)*37]. Evaluating this formula, you will find the relative atomic mass of chlorine.