Chlorine forms from the reaction of hydrochloric acid with manganese(IV) oxide. The balanced
equation is: MnO 2 + 4HCl → MnCl 2 + Cl 2 + 2H 2 O
Calculate the theoretical yield and the percent yield of chlorine if 86.0 g of MnO 2 and 50.0 g of HCl
react. The actual yield of Cl 2 is 20.0 g.

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Calcium chloride +gold(1) oxide—>