If ethanol (density = 0.784 g/mL) were used rather than water (density =0.998g/mL) to determine the density of the irregularly shaped marble pieces in question 6, how would the results have been affected? Clearly explain your answer. Assume the marble pieces do not dissolve in ethanol. Also, state clearly by circling the correct phrase before your explanation, if the reported density would be higher, lower or the same as that determined in water. A) Circle the correct choice: The reported density would be higher, lower or the same as the density determined in water.  B) Write your explanation below:

Use the graph on the last page to answer questions 10, 11 and 12. At 80˚C, what mass of sodiumchloride dissolves in1.0 L of water?

Solve question 26 and 27

The chlorine content of a pool with a capacity of 1.80×104 L was discovered to be 0.00145% by mass, which is well below the sanitary level of 0.00305%. How much chlorine needs to be added in order for the pool to meet the health regulation standard of 0.00305%? First draw a flowchart, then given that the pool consists of fresh water and chlorine, write the total mass (or alternatively chlorine mass) and fresh water balance equations, and then calculate the mass of chlorine in grams that needs to be added to the pool. Assume that the density of the pool water is the same as that of fresh water (1.00 kg/L), the pool is filled to its rated capacity (1.80×104 L), and that the required chlorine can be added to this capacity.

Note: The explanation of this work would be we did a work on the process of preparing diverse solution sets and regarding that these are the following sets of questions.  PART: 2 What happens to the solution's concentration when you add more solute to the same volume of solvent? How to raise the concentration of an aqueous solution? When is the ppm concentration applied? What do you conclude from this lab? Was your hypothesis confirmed or not? Explain your answer.

57.9 mL of 0.161 M Fe(NO3)3 and 24.7 mL of 0.557 M Ca(NO3)2 a) [ Fe3+ ] = 9.32 M; [ NO3- ] = 55.5 M; [ Ca2+ ] = 13.8 Mb) [ Fe3+ ] = 0.00932 M; [ NO3- ] = 0.0555 M; [ Ca2+ ] = 0.0138 Mc) [ Fe3+ ] = 0.161 M; [ NO3- ] = 3.59 M; [ Ca2+ ] = 0.557 Md) [ Fe3+ ] = 0.113 M; [ NO3- ] = 0.672 M; [ Ca2+ ] = 0.167 Me) [ Fe3+ ] = 0.0133 M; [ NO3- ] = 0.144 M; [ Ca2+ ] = 0.0460 M

An impure sample contains 1.01 g of impurities and 4.92 g of benzoic acid.  The impure sample is dissolved in water, then heated.  The solution is then cooled.  How many grams of benzoic acid will recrystallize when the solution has cooled? Include the unit and two decimal places in your answer. The solubilities of the impurity and benzoic acid in hot water are found as an item in the Recrystallization Experiment folder.   Solubility Data for Report Questions 10  Compound Cold Water solubility Hot Water Solubility Benzoic acid 0.42 g per 100 mL of water 5.79 g per 100 mL of water Impurity 0.61 g per 100 mL of water 4.62 g per 100 mL of water

Assume that 5.15 g of benzoic acid dissolves in hot water.   7.73 g of benzoic acid are added to 100 mL of hot water.  How many grams of benzoic acid will remain undissolved?

134.1 mg of NaCl (MM=58.44 g) is dissolved in 102.17 L of water. What is the concentration of Na+ ion (MM=22.99 g/mol) in ppm? Give your answer rounded to four digits to the right of the decimal point.

Help with the following question. Ksp for Co(OH)2 is 5.02 x 10^-6