An arctic weather balloon is filled with 20.9l of helium gas inside a prep shed. the temperature inside the shed is 13 degree c. the balloon is then taken outside, where the temperature is -9. degree c. calculate the new volume of the balloon. you may assume the pressure on the balloon stays constant at exactly 1atm. be sure your answer has the correct number of significant digits.

In apex! a liquid heated beyond a certain temperature becomes

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]