Suppose a student is given 5.375 g of a powdered mixture to separate. Because the mixture contains iron shavings, the student decides to separate them using a magnet and obtains 1.824 g of iron. What is the mass percent of iron in the mixture

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Determine the reaction and balance the following equations urgent due in the morning

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added