We have 250g of potassium oxide. Atomic masses of potassium and oxigen are, respectively, 39 and 16g/mol. how many atoms of potassium do we have? How many atoms of oxygen do we have ?

1. combine iron and copper (ii) sulfate solution. (hint: iron will form the iron (iii) ion) fe + cuso4 → 2. combine lead (ii) nitrate and potassium iodide solutions. pb(no3)2+ kl → 3. combine magnesium metal and hydrochloric acid solution. mg + hcl → 4. electrolysis (splitting) of water. h2o → 5. burning magnesium. mg + o2 →

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver