Explain what happens when there is a lot of extra greenhouse gases in our atmosphere. Explain what happens when there's not enough greenhouse gases in our atmosphere. Based on those answers, are greenhouse gases inherently good or bad? Explain.

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?