1. Examples of pure substances are elements and .
mixtures
compounds
2.
Iron and aluminum are examples of .
pure substances
compounds
3.
A is a physical combination of things that can be separated.
mixture
compound

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

How can you increase the strength of an electromagnet?

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?