Question

what are the masses of the four different brcl molecules? express the masses in atomic mass units using six significant figures, in decreasing numeric order (highest to lowest), separated by commas. view available hint(s) input box amu submit previous answers incorrect; try again; 5 attempts remaining

Explanation:

Step1: Identify isotopes of Br and Cl

Bromine has isotopes \( ^{79}\text{Br} \) (mass ≈ 78.9183 amu) and \( ^{81}\text{Br} \) (mass ≈ 80.9163 amu). Chlorine has isotopes \( ^{35}\text{Cl} \) (mass ≈ 34.9689 amu) and \( ^{37}\text{Cl} \) (mass ≈ 36.9659 amu).

Step2: Calculate masses of BrCl combinations

• \( ^{81}\text{Br}-^{37}\text{Cl} \): \( 80.9163 + 36.9659 = 117.8822 \) amu
• \( ^{81}\text{Br}-^{35}\text{Cl} \): \( 80.9163 + 34.9689 = 115.8852 \) amu
• \( ^{79}\text{Br}-^{37}\text{Cl} \): \( 78.9183 + 36.9659 = 115.8842 \) amu
• \( ^{79}\text{Br}-^{35}\text{Cl} \): \( 78.9183 + 34.9689 = 113.8872 \) amu

Step3: Order from highest to lowest

Sort the masses: \( 117.8822, 115.8852, 115.8842, 113.8872 \)

Answer:

117.882, 115.885, 115.884, 113.887