Chemistry, 30.11.2021 04:40, angie1281

I want to see how smart y'all are fwee points

What is a physical and chemical change?

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Chemistry, 21.06.2019 23:30, ashleyjaslin

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

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Chemistry, 22.06.2019 01:40, natannale

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

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Chemistry, 22.06.2019 12:30, murtaghliam1

Word equation for k(s) +h2o(l) yield koh (aq) + h2

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Chemistry, 22.06.2019 23:00, ceejay8005

The data below were determined for the reaction shown below. s2o82– + 3i – (aq) → 2so42– + i3– expt. # [s2o82–] (m) [i –] (m) initial rate 1 0.038 0.060 1.4 × 10 – 5 m/s 2 0.076 0.060 2.8 × 10 – 5 m/s 3 0.076 0.030 1.4 × 10 – 5 m/s the rate law for this reaction must be: