21. In the equation 2 AlBr3 + 3 K2SO4 → 6 KBr + 1 Al2(SO4)3 what is the molar ration of AIBr; and Potassium Bromide?
a. 1mol: 2 mol
b. 3 mol : 1 mol
c. 6 mol : 3 mol
d. 2 mol : 6 mol

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?