In an experiment, 1 mol of propane is burned to form carbon dioxide and water.
c3h8 + 502 3c02 + 4h20
1. how many moles of oxygen are needed for the reaction?
a 3 mol
b 1 mol
c 5 mol
d 10 mol

5 moles of O2are required, you can see it in your equation.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)