Chemistry, 17.07.2019 17:00, stinematesa

What is the formula unit for a compound made from lead (pb4+) and sulfur (s)?

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Chemistry, 22.06.2019 08:30, waterborn7152

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

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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 17:20, phanuel642

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

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Chemistry, 23.06.2019 05:40, shelbylynn1093

Why is it incorrect to balance a chemical equation by changing the subscripts? explain.