Author Question: On another planet, boron has two isotopes as follows: Isotope Mass (amu) Natural Abundance (%) ... (Read 92 times)

sc00by25 · **on:** Mar 21, 2021

Question 1

Nitric oxide, NO, is made from the oxidation of NH₃, and the reaction is represented by the equation:

4NH₃ + 5O₂→ 4NO + 6H₂O

A 9.3-g sample of NH₃ gives 12.0 g of NO. The percent yield of NO is _____.

◦ 78%
◦ 59%
◦ 46%
◦ 73%
◦ 18%

Question 2

On another planet, boron has two isotopes as follows:

Isotope Mass (amu) Natural Abundance (%)

Boron-10 10.0129 80.00

Boron-11 11.0093 20.00

Estimatethe average atomic mass of boron on this planet.

◦ 10.0 amu
◦ 11.0 amu
◦ 10.5 amu
◦ 10.8 amu
◦ 10.2 amu

nickk12214 · **Reply #1 on:** Mar 21, 2021

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