Chlorophyll a is one of the green pigments found in plants. Chlorophyll a has the molecular formula C55H72MgN4O5. How many atoms are in this molecule?

A-136

B-137

C-138

In which specific subshell is the highest energy electron in Ga found?

What mass in grams of ethylene oxide is needed to react with 18 g of water?

Two solid metal blocks are placed inside an insulated container. if there is a net flow of heat between the blocks, they must have different what?

Which quantity represents 0.500 Mole at STP

A metal hammer has been lying in the sunlight on a hot day. When you pick up the hammer, it feels very warm in your hand. Can you explain the different ways that heat is moving in this situation?

What occurs in a chemical reaction? Products are formed from reactants by the breaking and forming of new bonds. Products are formed without chemical bonds being broken. Reactants are formed without chemical bonds being broken.

What information does the atomic mass of an element provide

The following diagram represents a vertical cross section of sedimentary rock layers that have not been overturned. Which principle best supports the conclusion that these layers have undergone extensive movement since deposition?

What kind of ions do a sodium atom and a chlorine atom become when a valence electron is transferred from one to the other?

NaOH and bleach have several characteristics in common. They include all BUT one of the characteristics listed.