Calculate the average atomic mass of rubidium. rubidium has two isotopes, 85rb and 87rb. 85rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17%. 87rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. show your work.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

What is the number of moles in 15.0 g ash3?

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.