1. Кислотними оксидами є:
а) Na2О і SО2; б) N2О і СО2; в) N2О3 і СаО; г) СО2 і SО2

Consider the story you just read. all but one of the choices below indicate that something is living.

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.

Will mark as brainliest ! how many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (ii) nitrate solution react with excess aluminum metal? show all work needed to solve this problem!