Please help: 50.0 mL of wastewater containing the toxic Cadmium(II)ion was mixed with a solution containing excess sodium hydroxide to precipitate 1.248 g of Cadmium(II) hydroxide. The remaining sodium hydroxide solution was titrated with 52.62 mL of 0.48M sulfuric acid. a. What was the molarity of Cadmium(II) in the wastewater?
b. How many moles of sodium hydroxide were originally present in the sodium hydroxide solution prior to mixing with the wastewater?

Which of these will change if the air in aclosed bottle is heated? abcdthe mass of the airthe composition of the airthe air pressure in the bottlethe number of air molecules in the bottle

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.