Magnesium and nitrogen gas react in a combination reaction to produce magnesium nitride 3Mg (s) +N 2(g) Mg 3 N 2(s) In a particular experiment, a 7.40L sample of N_{2} reacts completely at STP . The mass of Mg consumed in the reaction is:

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)