PLEASE HELP WITH MY CHEMISTRY PLZ The carbon dioxide concentration in the atmosphere was 282 parts per million (ppm) in the year 1750.
In the year 2010, this increased to 387 ppm. Calculate the percentage increase in carbon dioxide
concentration over this period of time. Round your answer to the nearest whole number.

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.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology