Chemistry Homework Help

Browse Homework Solutions

81 solutions

Isotopes

Q. A hypothetical element has two main isotopes. One has a mass of 33 amu and the other has a mass of 35 amu. If the atomic weight of this element is 33.33 amu, what is the percent abundance of the 35 amu isotope? 1. 83.30% 2. 22.70% 3. 80.30% 4. 19.70% 5. 77.30% 6. 16.70%

Solved • Jan 31, 2020

Isotopes

Q. c. Boron has two isotopes. Both 10-B and 11-B are reasonably abundant. Knowing the atomic weight of boron is 10.81, which of the isotopes predominates?

Solved • Jan 29, 2020

Isotopes

Q. b. Chlorine has two isotopes. Both 35-Cl and 37-Cl are reasonably abundant. Knowing the atomic weight of chlorine is 35.45, which of the isotopes predominates?

Solved • Jan 29, 2020

Isotopes

Q. a. Strontium has four isotopes. Strontium-84 has a very low natural abundance, but 86-Sr, 87-Sr, and 8-Sr are all reasonably abundant. Knowing the atomic weight of strontium is 87.62, which of the more abundant isotopes predominates?

Solved • Jan 29, 2020

Isotopes

Q. What is the relative atomic mass of the element that consists of the following isotopes in the indicated natural abundances? Express your answer to three significant figures and include the appropriate units.

Solved • Jan 29, 2020

Isotopes

Q. What is the relative atomic mass of a hypothetical element that consists of the following isotopes in the indicated natural abundances? Express your answer to three significant figures and include the appropriate units.

Solved • Jan 29, 2020

Isotopes

Q. An element has three stable isotopes with masses of 27.977 amu, 28.976 amu, and 29.973 amu. The heavier two isotopes have an abundance 4.68% and 3.09%, respectively. What is the mass of the element? a) 28.085 amu b) 29.251 amu c) 27.684 amu d) 30.107 amu e) 28.991 amu

Solved • Jan 29, 2020