Why will soap not remove polar stains when in polar solvents? A. The soap is not attracted to the polar stain
B. The soap competes with the polar solvent to interact with the stain it doesn’t play a significant role in removing it
C. The polar solvent is too attracted to the tails of the soap molecules
D. If the soap surrounded the stain with the polar end the nonpolar end would come in contract with the polar solvent which is more stable

How many atoms of nitrogen are in the chemical formula ni(w on

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.

Calculate 9 ∙ 10-5 divided by 3 ∙ 10-9. (box after the "10" in answer is for the