How many milliliters of a 0.390 MKOH solution contain 1.67x10-2 mol of KOH? Express your answer...
How many milliliters of a 0.390 M KOH solution contain 1.76×10−2 mol of KOH?
If you had only 23 g of KOH remaining in a bottle, how many milliliters of 8.0 %(w/v) solution could you prepare? Express your answer using two significant figures. How many milliliters of 0.27 M solution could you prepare? Express your answer using two significant figures.
Question 13: How many milliliters of a 0.45 M solution contain 15.0 g of BaCl2? Express your answer using two significant figures Question 14: A bottle of 12.0 M hydrochloric acid has only 35.4 mL left in it. A)What will the HCl concentration be if the solution is diluted to 270.0 mL ?
Calculate the volume, in milliliters, of a 0.390 M KOH solution that should be added to 5.500 g of HEPES (MW = 238.306 g/mol, PK, = 7.56) to give a pH of 7.58. KOH volume = 17
1. A solution of rubbing alcohol is 76.5 % (v/v) isopropanol in water. How many milliliters of isopropanol are in a 77.5 mL sample of the rubbing alcohol solution? Express your answer to three significant figures. 2. How many liters of a 3.18 M K2SO4 solution are needed to provide 98.8 g of K2SO4 (molar mass 174.01 g/mol)? Recall that M is equivalent to mol/L. Express your answer to three significant figures.
1) A solution of rubbing alcohol is 69.0 % (v/v) isopropanol in water. How many milliliters of isopropanol are in a 88.8 mL sample of the rubbing alcohol solution? Express your answer to three significant figures. 2) How many liters of a 3.06 M K2SO4 solution are needed to provide 83.8 g of K2SO4 (molar mass 174.01 g/mol)? Recall that M is equivalent to mol/L. Express your answer to three significant figures.
How many atoms are in each elemental sample? Part A.) 3.8 mol Cu Express your answer using two significant figures. Part B.) 5.1×10−3 mol C Express your answer using two significant figures. Part C.) 16.1 mol Hg Express your answer using three significant figures. Part D) 0.235 mol Na Express your answer using three significant figures.
How many atoms are in each elemental sample? 3.5 mol Cu (Express your answer using two significant figures.) 7.5×10−3 mol C (Express your answer using two significant figures.) 15.2 mol Hg (Express your answer using three significant figures.) 0.190 mol Na (Express your answer using three significant figures.)
A) You have a stock solution of 15.8 M NH3. How many milliliters of this solution should you dilute to make 1500 mL of 0.300 M NH3? Express your answer using three significant figures. B) If you take a 11.5-mL portion of the stock solution and dilute it to a total volume of 0.550 L , what will be the concentration of the final solution? Express your answer using three significant figures.
1) How many grams are in 3.80 mol of sodium chloride (NaCl)? Express your answer numerically in grams. 2) How many water molecules are in a block of ice containing 2.25 mol of water (H2O)? Express the number of molecules numerically. 3) Calculate the mass of water produced when 2.98 g of butane reacts with excess oxygen. Express your answer to three significant figures and include the appropriate units. 4) Calculate the mass of butane needed to produce 69.9 g...