Chemistry, 20.07.2019 02:00, elijahmoore841
One biologist believes that the dinosaurs were destroyed by floods. one astronomer believes that comets and meteorites which struck earth made dinosaurs extinct. which of these statements best explains why the biologist and astronomer have different views about dinosaurs? a. scientific views are influenced by the scientists' background. b. data gives different results when tested at different periods of time. c. data associated with natural phenomenon change from time to time. d. scientists working with different sets of data arrive at different results.
Answers: 1
Chemistry, 21.06.2019 18:30, ciarakelly636owuiup
Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?
Answers: 1
Chemistry, 22.06.2019 13:50, amandamac7339
Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.
Answers: 1
One biologist believes that the dinosaurs were destroyed by floods. one astronomer believes that com...
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