If the molar mass of a substance is 67.2 g/mol, what is the mass of 8.0 mol of the substance

If the molar mass of one unit of a substance is 67.2g/mol, then the mass of 8 units will be 67.2 x 8 , which gives a figure of 537.6g/mol

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)