Question 2/5 Rubidium is a soft, silvory. white metal that has two common isotopes, Rb-85 and Rb-87. If the abundance of Rb-85 is 80.2% and the abundance of Rb-87 is 19.8%, what is the average atomic mass of rubidium?
A. 85.396 amu
B. 86.132 amu
C. 85.590 amu
D. 86.245 amu

How to convert a density of 0.791g/cm3 to lb/ft3

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90