Which of the following explain why life on Earth can exist? (Select all that apply.) A) Water particles from the hydrosphere combine in the atmosphere and fall to the Earth which provides water to living organisms.

B) The biosphere receives heat, air, and sunlight from the atmosphere for plants to grow and produce food.

C) The atmosphere protects the Earth from harmful ultraviolet rays and traps the sun's heat that warms up the biosphere to sustain life.

D) The geosphere provides the land that organisms in the biosphere live on.

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]