a. How to prepare 8.00% (v/v) ethanol solution? which option? option1.) Measure 8 mL of ethanol and dissolve it with 100 mL water. option2.) Measure 4 mL of ethanol and dissolves it with 45.5 mL water. option3.) Measure 7 mL of ethanol and dissolves it with 80.5 mL water option4.) Measure 8 mL ethanol and dissolve it with 91.5 mL water b. If there is 0.500 mg of selenium in 350 g of solution, calculate the selenium concentration? c.How many grams of NaCl and water are required to make 150 g of a 10% (w/w) NaCl solution?
a. How to prepare 8.00% (v/v) ethanol solution? which option?
b. If there is 0.500 mg of selenium in 350 g of solution, calculate the selenium concentration?
c.How many grams of NaCl and water are required to make 150 g of a 10% (w/w) NaCl solution?
d.A solution with a density of 0.876 g/mL contains 2.5 g of substance A with a molar mass of 92.14 g/mol and 112.5g of benzene. Calculate the molality and molarity of the solution.
e.What is the molarity and normality of a solution which is prepared by dissolving 75.0 g of Ba(OH)₂ in water and diluting it to 1.00 L. The molar mass of Ba(OH)₂ is 171 g/mol.
f.If 25.0 mL of a 2.19 M solution are diluted with 72.8 mL, what is the final concentration?
g.If 25.0 mL of a 2.19 M solution are diluted to 72.08 mL, what is the final concentration?
h. What volume of 5.0 M acetic acid is required to prepare 100 mL of 0.050 M acetic acid?
i.Chemicals are to be stored? which option?
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