How many moles contain 4.50x10^24 atoms of zinc

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

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

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.