Reports e-Services Y Academic Departments ETC - CIMS - Al Jula ion 27 Answer the following questions by using mole concept. et red (a) Calculate the molarity of a 155 g Na2SO4 in 770 ml d out of solution. [Atomic mass: Na=23 g/mol, S= 32 g/mol, O=16 g/mol, C=12 g/mol, H= 1 g/mol] in (a1)no of moles of Na2SO4 (a2) molarity of solution (b) 34 g C6H1206 is dissolved in 450 g of water. Find out the molality of the solution. (b1) no of moles of C6H1206 (b2) molality of solution

Reports e-Services Y Academic Departments ETC - CIMS - Al Jula ion 27 Answer the following questions by using mole concept. et red (a) Calculate the molarity of a 155 g Na2SO4 in 770 ml d out of solution. [Atomic mass: Na=23 g/mol, S= 32 g/mol, O=16 g/mol, C=12 g/mol, H= 1 g/mol] in (a1)no of moles of Na2SO4 (a2) molarity of solution (b) 34 g C6H1206 is dissolved in 450 g of water. Find out the molality of the solution. (b1) no of moles of C6H1206 (b2) molality of solution

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter10: Solutions

Section: Chapter Questions

Problem 16QAP

See similar textbooks

Similar questions

What mass of HCl is contained in 45.0 mL of an aqueous HCl solution that has a density of 1.19 g cm-3 and contains 37.21% HCl by mass?
Ten mL of concentrated H3PO4 (91.7% by mass, d=1.69g/mL) was accidentally poured into a beaker containing 20.0 g of NaOH. Not all the NaOH was consumed. How many grams of NaOH were left unreacted? The equation for the reaction is H3PO4(aq)+3OH(aq)3H2O+PO43(aq)
What is the molarity of each ion present in aqueous solutions of the following compounds prepared by dissolving 28.0 g of each compound in water to make 785 mL of solution? (a) potassium oxide (b) sodium hydrogen carbonate (c) scandium(III) iodite (d) magnesium phosphate
A cough syrup contains 5.0% ethyl alcohol, C2H5OH, by mass. If the density of the solution is 0.9928 g/mL, determine the molarity of the alcohol in the cough syrup.
Sodium borate decahydrate, Na2B4O710H2O is commonly known as borax. It is used as a deodorizer and mold inhibitor. A sample weighing 15.86 g is heated until a constant mass is obtained indicating that all the water has been evaporated off. (a) What percent, by mass of Na2B4O710H2O is water? (b) What is the mass of the anhydrous sodium borate, Na2B4O7?
How do we define the mass percent composition of a solution? Give an example of a solution, and explain the relative amounts of solute and solvent present in the solution in terms of the mass percent composition.
What is the molarity of each ion present in aqueous solutions of the following compounds prepared by dissolving 20.00 g of each compound in water to make 4.50 L of solution? (a) cobalt(lll) chloride (b) nickel(lll) sulfate (c) sodium permanganate (d) iron(ll) bromide
4-89 If 7.0 kg of is added to 11.0 kg of to form which reactant is in excess?
hich of the following statements is true for the reaction of nitrogen gas with hydrogen gas to produce ammonia (NH3)? Choose the best answer. l type='a'> Subscripts can be changed to balance this equation, just as they can he changed to balance the charges when writing the formula for an ionic compound. i>The nitrogen and hydrogen will not react until you have added the correct mole ratios. i>The mole ratio of nitrogen to hydrogen in the balanced equation is 1:2. i>Ammonia will not form unless 1 mole of nitrogen and 3 moles of hydrogen have been added. i>The balanced equation allows you to predict how much ammonia you will make based on the amount of nitrogen and hydrogen present.
On Easter Sunday, April 3, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate: 2HNO3(aq)+Na2CO3(aq)2NaNO3(aq)+H2O(l)+CO2(g) a. Calculate H for this reaction. Approximately 2.0 104 gal nitric acid was spilled. Assume that the acid was an aqueous solution containing 70.0% HNO3 by mass with a density of 1.42 glcm3. What mass of sodium carbonate was required for complete neutralization of the spill, and what quantity of heat was evolved? (Hf for NaNO3(aq) = 467 kJ/mol) b. According to The Denver Post for April 4, 1983, authorities feared that dangerous air pollution might occur during the neutralization. Considering the magnitude of H, what was their major concern?
4-103 Caffeine, a central nervous system stimulant, has the molecular formula C8H10N402. (a) How many moles of caffeine are present in 6.19 1025 molecules of caffeine? (b) Imagine you dissolve caffeine in water to a volume of 100.0 mL, which is known to have a density of 1.23 g/mL. How many molecules of caffeine are present in this volume? (c) How many nitrogen atoms are present in 3.5 mg of caffeine? (d) Complete the skeletal structure of caffeine, where all the bonded atoms are shown but double bonds, triple bonds, and/or lone pairs are missing. (e) Identify the various types of geometries present in each central atom of caffeine using VSEPR theory. (f) Determine the various relative bond angles associated with each central atom of caffeine using VSEPR theory (g) What is the most polar bond in caffeine? (h) Would you predict caffeine to be polar or nonpolar? (j) Consider the combustion of caffeine, which results in formation of NO2(g) as well as other expected products. Write a balanced chemical equation for this reaction. (j) The heat of combustion for caffeine is 2211 kcall/mol. How much heat will be given off if 0.81 g of caffeine is burned completely? (k) Calculate the weight of H2O(g) that can be prepared from 8.00 g of caffeine mixed with 20.3 g of oxygen gas.
A solution is prepared by diluting 0.7850 L of 1.262 M potassium sulfide solution with water to a final volume of 2.000 L. (a) How many grams of potassium sulfide were dissolved to give the original solution? (b) What are the molarities of the potassium sulfide, potassium ions, and sulfide ions in the diluted solution?