Edina

If you heat a mixture of Zn and HCl,and heat them together until all liguid has evaporated because excess HCl will be given off. What substance is left in the dish after the liquid has evaporated.

which word fits into the sentence? retreat,rage, enormous, prepare It is important to _____ situation that can become dangerous. ( think it is none, it probably should be "avoid", but was not among the choices.. is "retreat situation" makes sense? anyone?

What is another way to write this expression? 3 • 3 • a + b

you are a genius! thank you.