4. Which of the methods below could be used to crack a long-chain hydrocarbon?
A Mix the hydrocarbon with water and add
a cold platinum catalyst.
B Mix the hydrocarbon vapour with steam
and heat to a very high temperature.

What is the number of moles in 15.0 g ash3?

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?