Interpretation:
The correct conversion factor setup for the number of atoms present in
Concept Introduction:
Using the
Molar mass of a substance gives a relationship between the number of grams and number of moles of that particular substance.
The Chemical formula subscript also provides relationship between the number of moles of substance to the number of moles of its individual components present in the substance.
All the three above relationship can be put into a single diagram as shown below,
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EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- A physician prescribes a prescription of Doriden, 325 mg, which requires you to prepare 30 capsules to be taken by a patient 1 hour before bedtime. Assuming that you will make a minimum of extra powder, how many tablets will you use to make this prescription? How many capsules will you calculate for? (Doriden is available in your pharmacy as a 500 mg tablet weighing 750 mg) Select one: a. 20 tablets, 30.77 capsules b. 19 tablets, 30 capsules c. 19 tablets, 32 capsules d. 20 tablets, 40 capsules What is the weight in grams of 1 Liter of alcohol (density, 0.816 g/mL? O O Oarrow_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_forwardIn a neutral solution, the [H*] is : * 1.0x10-14M zero 1.0×107M O 1.0x10-7Marrow_forward
- The vapor pressure of component C is 272 torr, and that of component E is 176 torr at 35°C. The C-E solution at 35C with x=0.200 has a vapor pressure of 904.2 torr and vapor composition of x=0.272. 1. Calculate y, for C 2.15 and for E 4.99 : in this solution. 2. Calculate a, for C 2.42 and for E 2.678 in this solution. 3. Calculate p,-p, for component C 2264.38 : (J/mol) and E 857.32 : (J/mol). 4. Calculate AmyG= -1092.22 : (J) for the corresponding ideal solution.arrow_forwardYou just made a 1.5M permanganate solution. What concentration is your potassium permanganate solution in percent? "K: 39.10 g/mole" "Mn: 54.94 g/mole" "O: 16 g/mole" "MW of KMnO4 is 158.04 g/mole" O a. 0.24% Ob. 20.1% O c. 15.8% O d. 23.7% O e. 2%arrow_forwardGiven: 2KI +Pb(NO3)2 --> PbI2 + 2KNO3. How many grams of lead (II) iodide are produced if 0.250 moles of potassium iodide react completely? Group of answer choices 0.125 g 0.250 g 57.6 g 115 garrow_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_forwardA 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_forwardHow many grams of NaOH would you need to make 3,982 mL of a 3 M NAOH solution (m.w. = 40.00 g/mol)? Report your answer in the requested units to the nearest 2 decimal places (Example "40.02"). Do not report the units in your answer; enter the numbers only. It is recommended that you do not round between calculation steps.arrow_forward
- A mixture containing only KCl and NaBr is analyzed by the Mohr Method. A 0.3172-g sample is dissolved in 50 mL water and titrated to the Ag2CrO4 endpoint, requiring 36.85 mL of 0.1120 M AgNO3. A blank titration requires 0.71 mL of titrant to reach the same endpoint. Report the % (w/w) KCl and NaBr in the sample. [Ans . 84.41 % (w /w); 17.59 % (w /w)]arrow_forward6 x 10⁻⁵¹ = (0.15 M)² [S²⁻] [S²⁻] = (6 x 10⁻⁵¹) / (0.15 M)² Calculating, we find the minimum concentration of sulfide ion required: [S²⁻] ≈ 2.7 x 10⁻⁴⁹ M. check it calcution is writearrow_forwardAn unknown mixture is known to contain only Ba(OH)2 (MW=171.34 g/mole) and NaOH (MW=40.0 g/mole). If the mixture is known to contain 45% by mass NaOH, and 8.0 grams of the mixture is dissolved completely in 50.0 ml of solution, answer the following. c).If 10.0 ml of a 0.2 M solution of Na2SO4 was added to the 50.0 ml solution, what would be the final concentration of Na+ in solution.arrow_forward