Question

24x10^23 molecules of so2 react with 128g of o2
(1) find mass and volume of so3
(2) which is limiting reagent
(3) amount of excessive reagent left

Answer 1

Answer:

a hospital based cross-sectional study, it is planned to estimate the mean D-dimer level among COVID-19 patients. From previous literature, the standard deviation was found to be 200 ng/mL. If the researchers want to estimate the mean with a 50 ng/mL precision and 95% significance level, what is the minimum sample size required?