Iron filings are placed in powdered sulfur. Both iron and sulfur are elements. The iron and
sulfur are stirred together until they reach a uniform composition. Then the iron filings are
removed from the sulfur with the use of a magnet. What type of substance is the iron and
sulfur combination?

A. A pure substance
B. A compound
C. An element
D. A mixture

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

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.

Amedication is given at a dosage of 3.000 mg of medication per kg of body weight. if 0.1500 g of medication is given, then what was the patient's weight in pounds (lbs)? there are 453.59g in 1 lb.