Homework Answers
Add Answer to:
18) A1.20 M solution of K3PO4 is prepared. -- [1 point) a) The concentration of potassium...
A 1.20M solution of K3PO4 is prepared. What is the concentration of potassium ion in mol/L? What is the concentration of...
A 1.20M solution of K3PO4 is prepared. What is the concentration of potassium ion in mol/L? What is the concentration of phosphate ion in mol/L?
39) As mentioned in class, the convex shape of the cooling tower at a power plant...
39) As mentioned in class, the convex shape of the cooling tower at a power plant (e.g., Davis-Besse) maximizes surface area. Besides cooling the effluent from the turbines, name the one other thing done to it by the tower to prevent the effluent from causing environmental harm? [1 point] [1 point] True or False? It is not possible for a solution to have a pH of 0.0 (zero). [1 point] 41) True or False? Dative bonding occurs when both atoms...
f) What is the concentration in %(m/v) of a solution prepared by dissolving 50.0 g of...
f) What is the concentration in %(m/v) of a solution prepared by dissolving 50.0 g of sucrose in 220 mL of ethanol. g) What is the concentration in ppm of a solution that contains 0.234 g of lactic acid dissolved in 350 mL of aqueous solution? h) How many grams of glucose are present in 850 mL of a 4.25%(m/v) glucose solution. 8. The following questions involve calculations of equivalents or miliequivalents. a) How many equivalents of sodium ion and...
the concentration in %(m/v) of a solution prepared by dissolving 50.0 sucrose in 220 mL of...
the concentration in %(m/v) of a solution prepared by dissolving 50.0 sucrose in 220 mL of ethanol. hat is the concentration in ppm of a solution that contains 0.234 g of lactic acid dissolved in 350 mL of aqueous solution? h) How many grams of glucose are present in 850 mL of a 4.25%(m/v) glucose solution. 8. The following questions involve calculations of equivalents or miliequivalents. a) How many equivalents of sodium ion and sulfate ion are present in a...
1. An aqueous solution of potassium thiosulfate is prepared by dissolving 3.70 g of potassium thiosulfate...
1. An aqueous solution of potassium thiosulfate is prepared by dissolving 3.70 g of potassium thiosulfate in 7.11×102 g of water. The density of the solution is 1.37 g mL-1. a) Determine the mass percent of potassium thiosulfate in the solution. b) Determine the mole fraction of potassium thiosulfate in the solution. 2. An aqueous solution of potassium bromide is prepared by dissolving 8.75 g of potassium bromide in 8.29×102 g of water. The density of the solution is 1.20...
A solution of NaOH has an unknown concentration. When 1.396 g of potassium hydrogen phthalate (KHP a monoprotic acid...
A solution of NaOH has an unknown concentration. When 1.396 g of potassium hydrogen phthalate (KHP a monoprotic acid frequently used as an analytical standard) is titrated with the sodium hydroxide the end point is 42.54 mL. Use this information to compute the concentration of NaOH in the solution. The molar mass of KHP is 204.22 g mol1. [OH mol L
A solution of tartaric acid is prepared of concentration 1.2174 g L -1 and it is...
A solution of tartaric acid is prepared of concentration 1.2174 g L -1 and it is found that 50.0 ml of the solution requires 21.48 mL of 3.78 × 10-2 mol L -1 sodium hydroxide for complete neutralization. The formula of tartaric acid is C4H6O6 and its relative molecular mass is 150.2. Calculate how many of the hydrogens in a molecule of tartaric acid are ionised in aqueous solution.
16) Determine the concentration of a solution prepared by diluting 20.0 mL of 0.200 mol L-1...
16) Determine the concentration of a solution prepared by diluting 20.0 mL of 0.200 mol L-1 NaCl to 250.0 mL A) 0.00800 mol L-1 B) 2.50 mol L-1 C) 0.0320 mol L-1 D) 0.0160 mol L-1 E) 0.320 mol L-1 F) 0.160 mol L-1 17) A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.43 bar. What is the identity of the halogen? A) F2 B) Cl2 C) 12 D) Br2 E) At2 F)...
1 point What is the freezing point of an aqueous solution prepared by dissolving 113 g...
1 point What is the freezing point of an aqueous solution prepared by dissolving 113 g potassium carbonate (K,CO3, 138 g/mol) in 2.50 kg water. Use the ideal van 't Hoff factor. [K (water) - 1.86 °C/m) -1.83 °C +1.83 °C -0.609 °C -1.23 °C Previous Submit
17% 02/27/18 1 Question ( point) a See page 154 Most rum sold in liquor stores...
17% 02/27/18 1 Question ( point) a See page 154 Most rum sold in liquor stores is about 30.0-40.0% ethanol, C2H5OH, by volume. However, overproof rum, which is used to prepare flaming drinks might contain anywhere between 60.0 95.0% alcohol by volume. A t 200°C the densities of ethanol and water are 0789 g/mL and 0.998 g/mL, respectively. 1st attempt 63 Part 1 (0.3 point) Feedback hl See Periodic Table See Hint Calculate the number of moles of ethanol in...
39) As mentioned in class, the convex shape of the cooling tower at a power plant (e.g., Davis-Besse) maximizes surface area. Besides cooling the effluent from the turbines, name the one other thing done to it by the tower to prevent the effluent from causing environmental harm? [1 point] [1 point] True or False? It is not possible for a solution to have a pH of 0.0 (zero). [1 point] 41) True or False? Dative bonding occurs when both atoms...
f) What is the concentration in %(m/v) of a solution prepared by dissolving 50.0 g of sucrose in 220 mL of ethanol. g) What is the concentration in ppm of a solution that contains 0.234 g of lactic acid dissolved in 350 mL of aqueous solution? h) How many grams of glucose are present in 850 mL of a 4.25%(m/v) glucose solution. 8. The following questions involve calculations of equivalents or miliequivalents. a) How many equivalents of sodium ion and...
the concentration in %(m/v) of a solution prepared by dissolving 50.0 sucrose in 220 mL of ethanol. hat is the concentration in ppm of a solution that contains 0.234 g of lactic acid dissolved in 350 mL of aqueous solution? h) How many grams of glucose are present in 850 mL of a 4.25%(m/v) glucose solution. 8. The following questions involve calculations of equivalents or miliequivalents. a) How many equivalents of sodium ion and sulfate ion are present in a...
A solution of NaOH has an unknown concentration. When 1.396 g of potassium hydrogen phthalate (KHP a monoprotic acid frequently used as an analytical standard) is titrated with the sodium hydroxide the end point is 42.54 mL. Use this information to compute the concentration of NaOH in the solution. The molar mass of KHP is 204.22 g mol1. [OH mol L
16) Determine the concentration of a solution prepared by diluting 20.0 mL of 0.200 mol L-1 NaCl to 250.0 mL A) 0.00800 mol L-1 B) 2.50 mol L-1 C) 0.0320 mol L-1 D) 0.0160 mol L-1 E) 0.320 mol L-1 F) 0.160 mol L-1 17) A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.43 bar. What is the identity of the halogen? A) F2 B) Cl2 C) 12 D) Br2 E) At2 F)...
1 point What is the freezing point of an aqueous solution prepared by dissolving 113 g potassium carbonate (K,CO3, 138 g/mol) in 2.50 kg water. Use the ideal van 't Hoff factor. [K (water) - 1.86 °C/m) -1.83 °C +1.83 °C -0.609 °C -1.23 °C Previous Submit
17% 02/27/18 1 Question ( point) a See page 154 Most rum sold in liquor stores is about 30.0-40.0% ethanol, C2H5OH, by volume. However, overproof rum, which is used to prepare flaming drinks might contain anywhere between 60.0 95.0% alcohol by volume. A t 200°C the densities of ethanol and water are 0789 g/mL and 0.998 g/mL, respectively. 1st attempt 63 Part 1 (0.3 point) Feedback hl See Periodic Table See Hint Calculate the number of moles of ethanol in...
Most questions answered within 3 hours.
-
After running a regression analysis we calculated an F test and
the significance level was 0.15....
asked 15 seconds ago -
----Can someone please help me solve this one using JAVA
----I thank you in advance
Create...
asked 5 minutes ago -
) Raw materials are studied for contamination. Suppose that
the number of particles of contamination per...
asked 4 minutes ago -
1. What force primarily attracts the potassium ion to
the nitrate ion?
a. London forces...
asked 6 minutes ago -
What are the negative effects of abruptly stopping the use of
all fossil fuels? Give at...
asked 13 minutes ago -
Given that many conflict are the result of different parties having
different interests, is it possible...
asked 18 minutes ago -
A 750 g block can slide uniformly along the horizontal track
when a string attached to...
asked 21 minutes ago -
In 2017, Juan entered into a contract to write a book. The
publisher advanced Juan $50,000,...
asked 34 minutes ago -
Determine the number of kinds of protons in each molecule (w/
respect to NMR spectroscopy). Drawing...
asked 45 minutes ago -
A jeweler whose near point is 68 cm from his eye uses a
magnifying glass as...
asked 43 minutes ago -
A company wants to determine how many units of each of two
products, A and B,...
asked 47 minutes ago -
The blood pressure of a person changes throughout the day.
Suppose the systolic blood pressure of...
asked 55 minutes ago