Chemistry, 20.03.2021 06:00 thawngmawi
Suppose the mineral started out with K-40 atoms but no Ar-40. If the mineral now has equal numbers of K-40 and Ar-40 atoms (the ratio is now 1:1), how old is the crystal?
Answers: 1
Chemistry, 22.06.2019 02:50
What is the overall order of reaction for rate = k[no]2[o2]
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Chemistry, 22.06.2019 18:00
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]
Answers: 1
Chemistry, 23.06.2019 07:30
Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which term is mostlikely part of the safety contract
Answers: 3
Suppose the mineral started out with K-40 atoms but no Ar-40. If the mineral now has
equal numbers...
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