1. Calculate the number of moles in these quantities: (a) 25.0 g KNO3 (b) 56 millimol NaOH (c) 5.4 x 10 g (NH4)2C2O4 (d) 16.8 mL H2SO, solution (d = 1.727 g/mL, 80.0% H2SO4 by mass)

Q: How many grams of H2SO4 would be required to prepare 750.0 mL of 0.0900 N H2SO4?

A: Normality of solution = mass of soluteEquivalent mass of solute ×volume of solution(in L)  0.0900…

Q: What is the mass in milligrams of solute in 356 mL of a solution that contains 2.96 ppm of Pb(NO3)2?

A: Given :-  Volume of solution = 356 mL  Concentration of solution = 2.96 ppm  To calculate :-  Mass…

Q: A solution is made by adding 71.2 g of Na2S to water until the solution volume is 500.0 mL.  What is…

A: Mass of the Na2S is 71.2 g Volume of solution is 500 mL = 0.500 L Molarity of a solution can be…

Q: How is a 1% CuSO4 solution prepared by mass based on CuSO4.5H2O solid?

A: Given: 1% CuSO4 solution

Q: Commercial concentrated aqueous ammonia is 28% NH3 by mass and has a density of 0.90 g/mL. What is…

A:

Q: What mass of NaNO3 is required to prepare 27.3 mL of solution of NaNO3 with a molarity of 0.252 M?

A:

Q: How many moles of glucose (C6H12O6) are in 250. mL of 0.123 M glucose?

A:

Q: 3. Commercial concentrated aqueous ammonia is 28% NH3 by mass and has a density of 0.90 g/mL. What…

A:

Q: A solution is prepared by dissolving 102 g of NaCl in 924 g water to make a total solution volume of…

A: The following equation can give mass by Mass percent concentration of the solution. Mass…

Q: the molarity of cl- available in 110.ml of a solution containing 5.55 g of cacl2 is

A:

Q: 3. What volume of a .20 M solution of K₂SO4 solution contains 75 g of the solute?

A:

Q: A sample of 7.44 grams of magnesium chloride is weighed out on a balanced and prepared to a volume…

A: Interpretation: A sample of 7.44 grams of magnesium chloride is weighted out on a balanced and…

Q: How many moles of CoCl3 are in 172.6 ml of a 19.6 mass % solution of CoCl3 which has a density of…

A: We have volume of solution as 172.6 mL, having density of 1.206 g/mL . We have 19.6% mass percentage…

Q: o A solution of volume (300 ml), and if the solution contains (C6H1206) (Molecules (N)= 3.01x 1023),…

A: 1 mole = 6.022 x 1023 molecules 3.01 X 1023 molecules= 0.5 moles molarity= 0.5*1000/300= 1.66M

Q: what volume, in mL of ethanol (C:H&O), are present in the bottle?

A: Given :- %v/v = 6.50%  volume of beer (solution) = 750.0 mL  To be calculated :- volume of ethanol…

Q: How many grams of KNO3 are there in 198 grams of an aqueous solution that is 11.2 % by weight KNO3?

A: Mass percentage of solute = mass of solute ( KNO3) ×100mass of solution  11.2 = mass of solute(…

Q: How much Na2SO3 in grams, should be added to water to prepare a 541 mL of solution with a molarity…

A:

Q: How many moles of Na+ are in 125 mL of 0.98 M Na2SO4 solution?

A: The question is based on mole concept. We have to calculate number of moles of sodium Ion present in…

Q: 2) A sample of 0.892 g of potassium chloride (KCI) is dissolved in 54.6 g of water. What is the…

A: The formula for finding the mass percent is given by: Mass % = mass of solutemass of solute + mass…

Q: what volume, in ml of ethanol (C:H.O), are present in the bottle?

A: Given :- %v/v = 6.50 %           Volume of solution (beer) = 750.0 mL  To be calculated :- volume of…

Q: How many moles of K2SO3 are present in 237 mL of 1.21 M solution?

A: Given that : Volume of solution = 237 mL = 0.237 L Molarity = 1.21 M

Q: How many grams of Na2CO3 do you need to prepare 50.00 mL of a solution that is 1.04×10-3 M in Na+?

A: Given :-  Molarity of Na+ in solution = 1.04×10-3 M  Volume of solution = 50.00 mL  To calculate :-…

Q: Find the molarity of a 40.0% by mass aqueous solution of sulfuric acid, H2SO4, for which the density…

A: The concentration of a substance can be measured in terms of mass by mass percentage. This…

Q: What is the molarity of a solution in which 71.37 grams of sodium nitrate, NaNO3 are dissolved in…

A: Molarity of solution is defined as numbers of moles of solute dissolved per litre of solution.

Q: Household laundry bleach is a dilute solution of potassium nitrate (KNO3) mixed with water. How many…

A:

Q: How many grams of NaOH would you need to make 3,243 mL of a 7 M NaOH solution (m.w. = 40.00 g/mol)?

A: Molarity is defined number of moles of solute is dissolved in one litre of solutions

Q: How many grams of  KNO3  (101.11g/mol) are in 10.8 ml of a 1.25 M solution?

A:

Q: A solution is prepared by dissolving 3.38grams of acetone C3H6O in water to produce 1.27 Liters of…

A: Here we have to determine the molarity of solution if 3.38 g of acetone is dissolved in water having…

Q: A medical lab is testing a new anticancer drug on cancer cells.The drug stock solution concentration…

A: Using molarity expression the number of drug molecules in given volume of drug solution is…

Q: How many milliliters of water should a chemist addif they want to prepare an 0.200 M aqueous…

A:

Q: In the standardization of a solution of NaOH against 2.508 grams of oxalic acid (H2C2O4•2H2O), 42.53…

A: An acid exactly neutralizes the same number of equivalents of base and vice-versa. milliequivalents…

Q: An aqueous solution contains 6.00% NaBr, the density of the solution is 1,046g/cm^3. What is the…

A: 6 % by mass NaBr means 6 g of NaBr is present in 100 g of solutionMass of solute (NaBr) present =…

Q: What is the molarity of a solution made by dissolving 12.711 g of potassium carbonate, K2CO3, in…

A:

Q: What is the mass in grams of Na2CO3(s) (molar mass = 105.98 g/mol) that, when dissolved in 104 mL of…

A: Molar mass of Na2CO3 = 105.98g/mol Volume of water = 104mL Molarity ,M = 0M

Q: What mass of oxalic acid, H2C2O4  is required to prepare 350. mL of a solution that has a…

A:

Q: What mass of a concentrated solution of nitric acid (68% HNO3 by mass) is needed to prepare 400 g of…

A: Percentage of solution can be determined by dividing the mass of the soluteby the mass of the…

Q: How many of liters 3.5 M of C3H&O can be prepared by 70 grams of C3HSO?

A: Molarity: It is defined as the number of moles of solute present in one liter of solution. It is…

Q: a. What is the mass percent of NaCl if 6 grams of NaCl dissolved in 123 grams of solution?  b. What…

A:

Q: What mass, in g, of (NH4)2SO4 is needed to prepare 7.0x10' mL of a 0.250 M solution?

A: Molarity is the units of concentration. It can be calculated by dividing the number of moles of the…

Q: a. How many grams of sodium sulfate are required to prepare 250.0 mL of a sodium sulfate solution…

A:

Q: How many grams of solute are present in  505 mL  of  0.690 M KBr?

A:

Q: a person consumes 4lts of oxígen (O2) per minute when breathing.how Many moles would that be per…

A: given:Vol of Oxygen consumed= 4LTime taken to consume = 1 mintotal time oxygen is taken in = 1 hr =…

Q: Isotonic saline solution has a mass % NaCl concentration of 0.900 %. Assuming its density is 1.00…

A: Given, Density of isotonic solution = 1.00 g/ml Mass percent of NaCl = 0.900 % 0.9 % means 0.9 g of…

Q: Calculate the volume (in mL) of 3.792 M sucrose containing 0.6185 moles sucrose.

A: Given :-  Molarity of solution = 3.792 mol/L  Number of moles of solute (sucrose) = 0.6185 mol  To…

Q: How many grams of a 7.50% by mass calcium nitrate solution are needed to obtain 3.75 grams of…

A: In this question, we want to determine the mass of the solution which needed to obtained 3.75grams…

Q: The density of an aqueous solution containing 40.0% sulfuric acid (H2SO4) by mole is 1.681 g/mL. b)…

A:

Q: What volume in liters of a 8.9 M Fe(NO3)3 solution can be diluted to prepare 186.5 mL of a solution…

A: Given: Initial molarity=M1=8.9 MFinal molarity=M2=1.5 MFinal volume=V2=186.5 mL To find: Initial…

Q: How many mL of 0.02 M Na2S2O3 contain this number of moles?

A: Moles of solute ( Na2S2O3) = Molarity x volume of solution (in L) Let V mL is the volume of…

Q: ML b. Describe how you would prepare 1 L of a 50 mM solution of acetic acid. The gram formula weight…

A: There are different ways in which we can express  the concentration of the species