What is the pH of a 0.10 M solution of oxalic acid, H₂C₂O4 What are the concentrations of H₂O*, HC₂O, and the oxalate ion, C₂0₂² For oxalic acid, Kai-5.9 x 10-2 and K₂2-6.4 x 10-5.

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1. Which of the following is not a step in preparing a water sample container?a. All sample containers must be dark in colorb. The type of sample container and the level of cleaning required depend on the type of sample to be takenc. All sample containers must be thoroughly cleaned in the laboratory before sampling is carried outd. The number of containers prepared must always be in excess of what is needed, for quality assurance, quality control and reserves 2. The purpose of environmental sample analysis is..a. To determine the origin and concentration of chemicals in the environmentb. To determine the origin, concentration of chemicals and/or pollutants in the environmentc. To determine the concentration of a chemical in the environmentd. To determine the cause and concentration of pollutants in the environment

During the production of pure iron, limestone and coke are used. What are their purposes? (Inorganic Chemistry)

Lorena placed a cup with a stick of butter in it on one side of a balance and a melted stick of butter of the SAME SIZE on the other side of the balance. Choose the picture that correctly shows what the balance would looks like