Which of the following is an example of chemical change? a.) stirring butter and sugar together b.) adding food coloring to water c.) burning a candle d.) breaking a rock into smaller pieces

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 →

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

Why do cells appear different in distilled water than they do in 10% salt water?