Chemistry, 29.01.2020 05:46 naomirice24
When looking at the percentage of patients whose symptoms were relieved after taking a placebo, a scientist sees a 20% success rate. the success rate of patients whose symptoms were relieved after taking a new composite drug was 30%. the scientist determines that the margin of error is 10%, which indicates that the new drug had no statistically significant positive effect. in which stage of the engineering process is this scientist?
a. evaluating test results
b. screening
c. identifying a need
d. looking for future improvements
Answers: 3
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Embryos of different species look very similar, which shows that the organisms share a ancestor.
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Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он
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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]
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Chemistry, 22.06.2019 21:50
28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action
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When looking at the percentage of patients whose symptoms were relieved after taking a placebo, a sc...
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