What is the total number of moles of hydrogen atoms contained in 1 mole of (NH4)2C20?

What is the correct lewis structure for chloroform chcl3

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.