Chemistry, 01.02.2021 20:40 Serenitybella

How can you model the cycling of matter in the Earth system?

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Chemistry, 22.06.2019 03:10, lilque6112

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

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Chemistry, 22.06.2019 11:00, bigwaYne

Imagine that twenty i. u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

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Chemistry, 22.06.2019 12:10, yootmytoot

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

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Chemistry, 22.06.2019 13:30, suemmimonjaras8374

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.