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EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- An oxide of nitrogen contains 63.1% oxygen and has a molar mass of 76.0 g/mol. A. What is the empirical formula for this compound?arrow_forwardAt 39.9ºC, a solution of ethanol (XetOH = 0.9006, P * etOH = 130.4 Torr) and isooctane (P * iso = 43.9 Torr) forms a vapor phase with YetOH = 0.6667. The total pressure is 185.9 a. Calculate the activity and the activity coefficient of each component.b. Calculate the total pressure the solution would have if it were ideal.c. Comparing the ideal pressure to the actual pressure, what does this indicate about the molecular interactions?arrow_forwardCompound A contains 63.68% C, 9.8% H, 12.38% N and the rest is O by mass. The empirical formula for compound A is? O a. C₂H₁1 NO3 O b. С₂H₁₁NO O c. none of these O d. C6H11NO2arrow_forward
- A chemist combined chloroform (CHCI,) and acetone (C, H,O) to create a solution where the mole fraction of chloroform, Xchloroform, is 0.187. The densities of chloroform and acetone are 1.48 g/mL and 0.791 g/mL, respectively. Calculate the molarity of the solution. Assume the volumes are additive. molarity: Calculate the molality of the solution. molality: marrow_forwardEthyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable. A sample of ethyl mercaptan weighing 3.17 mg contains 1.64 mg of sulfur. What is the mass percentage of sulfur in the substance?arrow_forwardThe concentration of a certain sodium hydroxide solution was determined by using the solution to titrate a sample of potassium hydrogen phthalate (abbreviated as KHP). KHP is an acid with one acidic hydrogen and a molar mass of 204.22 g/mol. In the titration, 58.23 mL of the sodium hydroxide solution was required to react with 0.3520 g KHP. Calculate the molarity of the sodium hydroxide. Molarity = __________ Marrow_forward
- The molecular weight of glucose is 180.16 g/mol. Say you want to make 100 ml of a 0.6M solution of glucose. How much glucose and water should you use? Show your calculations for how you would make this solution.arrow_forwardElemental analysis of a compound with molar mass 342.3 g/mol gives the following mass percent composition: C 42.11%, H 6.48%, O 51.41%. Find the molecular formula of the compound. Enter your answer in the space below using the following format: if the molecular formula of a compound containing elements X, Y, and Z is X2YZ3 enter your answer as X2YZ3.arrow_forwardDetermine the mass in grams of 2.10 × 10²¹ atoms of copper. (The mass of one mole of copper is 63.55 g.)arrow_forward
- You are given a solution of 0.117 M NaOH solution. You need to neutralize 10.00 mL of the NaOH solution with an acid called KHP. The reaction is: KHP+ NaOH --> H2O + a salt If you are going to make up a KHP stock solution in a 100.00 mL Volumetric flask and use 14.137 mL of the KHP stock solution to neutralize the NaOH, what mass of KHP would you need to use? The molar mass of KHP is 204.22 g/molearrow_forwardMake a conclusion: pH = 7,56 PCO₂ = 30 mmol/l SB = 28 mmol/l BB 50 mmol /1 = BE = +5 mmol/larrow_forwardDetermine the mass in grams of 6.42 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01 g.)arrow_forward
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