Concentration expressed in Molarity (M)= (No. Of moles of urea) ÷ (Volume of solution in litres)
= 0.820 moles ÷ 0.5 litres
= 1.64 M
So, option B is correct i.e. 1.64 M
please help! What is the concentration of a 500 mL urea [(NH2)2CO] solution containing 0.820 moles...
What is the osmotic pressure (in atm) of a 1.36M aqueous solution of urea [(NH2)2CO] at 22.0 degree celsius.?
1. 5.00 g of urea, (NH2)2CO is dissolved in 250.0 mL of water(density = 1.00 g/mL) at 30.0oC in a coffee cup calorimeter. When this is done, 27.6 kJ of heat is absorbed. (5 points) a) Is the solution process exothermic or endothermic? c) What is qwater? d) What is the final temperature of the solution(specific heat constant of water is 4.18 J/g.OC)? Please show all the work!! thank you very much :)
The rearrangement of ammonium cyanate to urea in aqueous solution at 50 °C NH4NCO(aq)->(NH2)2CO(aq) is second order in NHANCO with a rate constant of 1.10x10-2 M-min-7. If the initial concentration of NHANCO is 0.451 M, the concentration of NHANCO will be 6.00x10-2 M after minutes have passed. Submit Answer Retry Entire Group 8 more group attempts remaining
If 2.75 g of urea CO(NH2)2 are dissolved to make 50.0 mL of solution.. what is the molarity of this solution ? if you take 10.0mL of this solution how many moles of urea do you have? if you dilute this 10.0mL portion to 200mL what is the molarity of the solution?
9. A solution of ethyl alcohol (C2H5OH) in water has a concentration of 20.56% v/v. What volume of C2H5OH is present in 255 mL of solution? 10. What mass of KCl is present in 475 mL of a 1.09% m/v aqueous solution? 11. What is the molarity of 0.500 L of a potassium chromate solution containing 0.0650 mol of K2CrO4? 12. What is the molarity of 4.50 L of a solution containing 0.206 mol of urea [(NH2)2CO]?
What is the molarity of 0.500 L of a potassium chromate solution containing 0.0650 mol of K2CrO4? What is the molarity of 4.50 L of a solution containing 0.206 mol of urea [(NH2)2CO]? What mass of HCl is present in 825 mL of a 1.25 M solution? What mass of isopropyl alcohol (C3H8O) is dissolved in 2.050 L of a 4.45 M aqueous C3H8O solution?A 50.0 mL sample of saltwater that is 3.0% m/v is diluted to 950 mL. What...
Two 1-L beakers, A and B, each containing a different aqueous solution of urea (a nonvolatile nonelectrolyte with MW = 60.06 g/mol) are placed together in a box, which is then sealed. The temperature remains constant at 20 °C. Initially, there is 270 mL of solution in A and 690 mL of solution in B. As the solutions stand in the sealed box, their volumes change slowly for a while. When they stop changing, beaker A contains 490 mL and...
please show work 17) When 200, mL of water are added to 100. mL of 12 % KCl solution the final concentration of KCI is (Assume the volumes add.) A) 12% B) 4.0% C) 36%. D) 6.0% E) 8.0% 18) What is the molarity of a solution containing 5.0 moles of KCI in 2.0 L of solution? A) 2.5 M B) 1.0 M C) 5.0 M C) 10. M E) 2.0 M 19) What is the molarity of a solution...
please just the answers without the work 1. Determine the molarity of the solution containing 1.5 moles of NaOH in 1000 mL total volume of solution. 2. Determine the molarity of the solution containing 0.4 moles of NaOH in 100 mL total volume of solution. 3. Determine the molarity of the solution containing 1.5 moles of KNO3 in 250 mL total volume of solution. 4. Determine the molarity of the solution containing 2.4 moles of KI in 140 mL total...
5. Urea, CO(NH2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. What is the maximum mass of urea that can be manufactured from the CO2 produced by the combustion of 1.00 e3 kg of carbon followed by the reaction: CO2(g) +2 NH3(g) → CO(NH2)2 (s) + H20 (1) 6. A mordant is a substance that combines with a dye to produce a stable fixed color in a dyed fabric. Calcium acetate is...