When a connector is marked with "al-cu," the connector is suitable for use with copper, copper-clad aluminum, and aluminum conductors?

When connectors are marked with a combination of metals, it can be used as a connector of one of the metals or an alloy of the two metals. So in this case, since the marking is “Al – Cu” where Al is aluminium and Cu is copper, therefore the answer is:

Yes, it is suitable for use with copper, copper-clad aluminum, and aluminum conductors.

if you mean hydrogen and oxygen then water is the product

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.