Each of the two days of the year when neither hemisphere is tilted toward or away from the sun is called a(n)

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 →

What is avogadro’s number, and why is it useful

Express the following number in scientific notation. 0.026890 =