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- How many moles of calcium fluoride (78.07 g/mol) will dissolve in 10.0 L of water at 25°C? Ksp of CaF2 is 3.9 x10-11 0.167 0.00214 2.36 x 10-4 6.24 x 10-6How many nM are there in 3.4 µg/10 ml of NADH of molecular weight 664.44?(a) What is the molarity of a solution made by dissolving 10 moles of sucrose, C12H22O11, in 10L of water? (b) How much boric acid (H3BO3), in grams, is needed to be dissolves in 300.g of water to make a 1.50m aqueous H3BO3 solution? The molar mass of H3BO3 is 61.83g/mol. (c) How much aluminum sulfate (Al2(SO4)3) in moles, is needed to be dissolved in 500g of water to make a 1.0m aqueous Al2(SO4)3 solution?
- What volume of 0.3107 M NaOH is required to neutralize 281.2 mL of 0.1078 M H2SO4?2,4-Dichlorophenoxyacetic acid ("2,4-D") is a widely used herbicide with the molecular formula C8H6Cl2O3C8H6Cl2O3. The pKapKa of 2,4-D is 2.73. A certain water-based herbicide product contains 130 gL−1gL−1 of 2,4-D. What is the pHpH of the 2,4-D solution?When fluorite (CaF2; see photo) is pulverized and shaken in water at 18°C, 10.0 mL of solution contains 1.5 x 10-4 g of solute. Find the Ksp of CaF2 at 18°C.
- What molaity of pentane is obtained by dissolving 5g pentane, C5H12, in 245 g hexane C6H123 Why is salt reported as S/M (percentage of moisture) in cheese instead of aw as a percentage of the total weight of the cheese8)For an adult rhe recommended dietey allowed for Se is 55 migrocrams a day. How many miligrams of selenium are recommended?