Copper ( ||) sulfate crystals CuSO₄ · H₂O can be made by heating copper ( || ) oxide with dilute sulfuric acid and then crystallising the solution formed. a) Calculate the maximum mass of crystals that could be made from 4.00g of copper ( ||) oxide using an excess of sulfuric acid.

CuO(s) + H₂SO₄(aq) → CuSO₄(aq) + H₂O(l)
CuSO₄ (aq) + 5H₂O (l) → CuSO₄ · H₂O(s)

b) If the actual mass of CuSO₄ collected at the end of the experiment was 11.25g . Calculate the percentage yield (RAMs : H -1, O-16, S-32, Cu-64)

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory

Due tomorrow which would have a lower ph, a 0.1 m solution of a strong base or a weak base? why? which would have a higher ph, a 0.1 m solution of a strong base or a weak base? why?