72.2% of element X is mass number 85. 27.8% is mass number 87. What is the average atomic mass of element X? (Round to
the correct number of significant figures.)

11

Explanation:

it's filtration, but this is an assumption so my apologies if i got this

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)