A chemist reacts zinc with nitric acid and obtains 65.7 grams of Zinc (II) nitrate. The theoretical yeild for the reaction was calculted to be 89.2 grams of Zinc (II) nitrate. Calculte the percent yield for the reaction. a
0.737 %
b
13.6 %
c
73.7 %
d
1.36 %

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.

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(jacemorris04)