The element weirdium (We), found only on the planet Crosbia has only two isotopes; We-60 (60.00 amu) and We-90 (90.00 amu)! The average atomic mass of a naturally occurring sample
of weirdium is 70.00 amu. Calculate the percent abundance of We-60.

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Which statement best describes the flow of energy in this scenario