Chemistry, 06.01.2022 16:10 owlette2001
Which of the following statements provide evidence to support the big bang theory? Select the two correct answers.
Small spiral galaxies become larger elliptical galaxies when they collide.
The ratios of hydrogen and helium in the universe match those of the early universe.
The universe began as a very high density singularity.
Dark matter makes up the majority of matter in the galaxy.
Please help!
Answers: 2
Chemistry, 22.06.2019 05:40, Maryjasmine8001
Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml
Answers: 2
Chemistry, 22.06.2019 08:00, danielhall
Identify a strong intermolecular force of attraction between an alcohol
Answers: 1
Chemistry, 22.06.2019 13:30, Sbeech7246
Why does asexual reproduction result in offspring with identicle genetic variation
Answers: 2
Which of the following statements provide evidence to support the big bang theory? Select the two co...
Chemistry, 19.04.2021 04:00
Mathematics, 19.04.2021 04:00
Mathematics, 19.04.2021 04:00
English, 19.04.2021 04:00
Health, 19.04.2021 04:00