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

What are the branches of chemistry

What kind of reaction adds water to break large molecules into subunits?

What volume will 2.0 moles of nitrogen occupy at. 947atm and 20° C?

The temperature in the stratosphere is - 24°c. calculate the root-mean-square speeds of n2, o2, and o3 molecules in this region.

A certain radioactive nucleus undergoes exponential decay with a half-life of 10 days. The fraction of the initial sample that remains after 2 half lives?

A certain radioactive element has a half-life of one hour. if you start with 1.0 gram of the element at noon, how much of the radioactive element will be left at 2 p. m.? 0.50 grams 0.25 grams 0.125 grams 0.0 grams

Name two bases which react with dillute sulfuric acid to give zinc sulfate

What is the correct name for the compound nh4clo4?

What is the molality of a solution when 1.2 moles MgCl2 is stirred in 1000 grams of water?

How many elements are in one molecule of Methane? How many elements are in one molecule of Ammonia? How many elements are in one molecule of Vinyl Alcohol? How many elements are in one molecule of Ethylene?