A hot air ballon rises because? a. molecules become lighter when heated
b. molecules move faster and father apart when heated
c. molecules are less attracted by gravity when heated
d. molecules become charged and repel each other when heated ​

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?