Chemistry, 27.01.2020 23:31 goargrant

Cosmic rays are: ) high energy radiation produced by the sun. b) high energy radiation produced in the ozone layer. c) high energy radiation produced by the earth's core. d) none of these

Answers: 3

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 01:40

Which of these best describes an ionic bond?

Answers: 2

Answer

Chemistry, 22.06.2019 04:00

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Answers: 1

Answer

Chemistry, 22.06.2019 09:00

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Answers: 2

Answer

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

Answer

You know the right answer?

Cosmic rays are: ) high energy radiation produced by the sun. b) high energy radiation produced in t...

Questions