E unbalanced chemical equations to the correct coefficients Xe + F: + XeF6
Hgo → Hg + O2
Cao + c + CaC2 + CO
NaHCO3 → Na, CO, + CO2 + H2O
N2 + H2NH3
.: 2.2.1
:: 1.3.1.1
:: 131
*: 2.1.1.1
#: 1.3.2

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.

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green

How does carbon monoxide pose the greatest threat to humans? a. it can be produced by wood fires. b. it can be produced by home furnaces. c. it is produced by acid rain. d. it is produced by modern automobiles.