(15 points) will mark branliest if ! imagine you are trying to determine whether chemicals r and s are similar. a) separately, you react r and s with chemical x and each produced a color change from red to yellow. at this point, do you think r and s are similar? how similar? this point, do you think r and s are similar? how similar? are similar? how similar? b) now r and s are reacted separately with y. r makes a black precipitate while s has no reaction. at c) now r and s are reacted separately with z. both produce a gas. at this point, do you think r and s

Which best describes why nh4+ can form an ionic bond with cl-?

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]

When the mercury level in a barometer decreases that atmospheric pressure has