Okoye added 5 g of KCl to a beaker with 10 cm² of water and stirred until no more solute would dissolve, the remaining solute was filtered from the mixture then dried and weighed, and it was found to be 1.5g. The temperature of the room was 25 °C. a) Determine the mass of solute dissolved in water?

b) Use the answer from part a. to work out the solubility at this temperature.

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 →

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?