Lee’s family has a summer cottage that they usually close up for the winter. One year, they closed up the cottage on October 8. When they returned the next year, on May 22, they discovered that they had left a 1 kW heater on. Assuming that the heater ran about half the time, approximately how much did this little mistake add to their electricity bill?

The compound methyl butanoate smells like apples. its percent composition is 58.8% c, 9.9% h, and 31.4% o. what’s the empirical formula ?

How does a hydroelectric power plant converts energy into energy.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.