Naturally occurring Strontium (Sr) consists of the four stable isotopes below and has an average atomic mass of 87.62 amu. Based on only this data, select the isotope that is MOST abundant, or choose E. if insufficient
information is provided to make a conclusion.
Strontium Isotope Isotopic Mass (amu)
A. Strontium-84 83.9134
B. Strontium-86 85.9092
C. Strontium-87 86.9088
D. Strontium-88 87.9056
E. Cannot determine from information provided.

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.