A student is trying to find the area of a rectangle. He records the length as 10 cm while the width is 16.6 cm.
What is the area of the rectangle? (Use the formula: Length
x Width) Select the answer with the correct number of
significant figures.

A) 26.6 cm^2
B) 166 cm^2
C) 200 cm^2
D) 170 cm^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.

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted