Senko

A gray kangaroo can bound across level ground with each jump carrying it 8.4 from the takeoff point. Typically the kangaroo leaves the ground at a 23 angle. What is its takeoff speed? What is its maximum height above the ground?

In acidic solution, VO_2^+1 is reduced to VO^2+, whereas Mn^2+ is oxidized to MnO_4^-1 . Given the partial equation VO_2^+1? +Mn^2+? ---> VO^2+ ? + MnO_4^-1? What must the coefficients be so that the electrons are balanced?