A chemistry graduate student is given 300 mL of a 0.20 M ammonia (NH3) solution. Ammonia is a weak base with Kb = 1.8 x 10^-5.
(a) What mass of NH4Br should the student dissolve in the NH3 solution to turn it into a buffer with pH = 9.10?
You may assume that the volume of the solution doesn't change when the NH4Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

2b2t

explanation:

2b2t

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a