Calculate the concentration of an HCl with a pH of 3.82

Iwll give extra points to who gets this for ! what type of reaction is this? ?

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned