Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. Use the Periodic Table to find molar masses.

How many moles of ethanol are present in the sample?

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!