In order for the reaction Al + HCI -> AICI3 + H2 to occur, which of the following must be true:

a. Al must be above H on the activity series

b. Al must be above Cl on the activity series

c. None of these

d. Heat must be supplied to the reaction

e. AlCl3 must be a precipitate

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.

To separate a mixture of hard candies nd marbles the most efficient method would be

Which answer below correctly identifies the type of change and the explanation when magnesium comes into contact with hydrochloric acid