Two roller skaters are skating together. THe 60kg skater pushes a 30 kg skater with a force of 5N. The force exerted by the 30Kg roller skater on the 60 kg roller skater is __ Newtons

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.

How can the periodic table be used to predict the behavior of elements?

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass