How many oxygen atoms were used to write Felicia’s name?

Plz me get these answer dubble cheak ur answer plz ppl i need it right

Starch and are common polysaccharide carbohydrates found in plants. sucrose glycogen fructose cellulose

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 →