3. Express the following numbers in scientific notation, making sure there is only one nonzero digit to the left of the decimal place. Do not discard any nonzero digits.
a) 0.000890
b) 35470

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?

Air can be considered a mixture. which statement does not explain why?

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.