Interpretation:
From the given formula mass of
Concept Introduction:
Sum of atomic masses of all the atoms that are represented in chemical formula of substance is known as formula mass. If
Molar mass is the mass that is expressed in grams of a substance that is equal to the formula mass of the substance numerically. Molar mass of an element is unique for the particular element. Two natural elements can never have the same molar mass.
Mole is defined as the amount of substance that has as many elementary particles as there are atoms in exactly 12 grams of
The relationship between the atomic mass unit and grams unit is,
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Chapter 6 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- How many moles of NazSO4 are in 100.0 mL of a 0.2500 M solution ? The GFW is 142.07 g. A. 0.0500 moles B. 0.500 moles C. 0.00250 moles D. 0.0250 moles E. 0.00500 molesarrow_forwardThe molecular weight of ethanol (CH3CH2OH) is46 and its density is 0.789 g/cm3.A. What is the molarity of ethanol in beer that is 5%ethanol by volume? [Alcohol content of beer varies fromabout 4% (lite beer) to 8% (stout beer).]B. The legal limit for a driver’s blood alcohol contentvaries, but 80 mg of ethanol per 100 mL of blood (usuallyreferred to as a blood alcohol level of 0.08) is typical. Whatis the molarity of ethanol in a person at this legal limit?C. How many 12-oz (355-mL) bottles of 5% beer coulda 70-kg person drink and remain under the legal limit? A70-kg person contains about 40 liters of water. Ignore themetabolism of ethanol, and assume that the water contentof the person remains constant.arrow_forwardFind the Gibbs free energy of mixing when 2 moles of ethanol is mixed with 5 moles of water at a temperature of 27 °C. The pressure of the system is kept constant. The two liquids form an ideal solution. O A. -10.45 J O B. 10.45 kJ O C. -11.75 kJ O D. 11.75 kI O E. -10.45 kJarrow_forward
- Terpin hydrate contains 1 gr of codeine per fluidounce. How much codeine (in mg) should be added to 8 fluidounces such that each teaspoonful contains 20 mg of codeine? Select: a 946.2 mg b. 427.8 mg c. 518.4 mg d. 6.55 mg. Please type answer note write by hend.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_forwardAntacid tabletAluminum hydroxide 325 mgMannitol 812 mgSodium saccharin 0.4 mgSorbitol (10% w/v sol’n) 32.5 mgMagnesium stearate 35 mgMint flavor concentrate 4 mgBatch size: 150,000 tabletsHow much mannitol is needed for the batch size?a. a.12.2 kgb. 121.2 kgc. 121.8 kgd. 1218 kgarrow_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_forwardNathan wants to take 25mg of Phenergan for his nausea. Phenergan comes packaged as 12.5mg per 2tsp. How many tsp of Phenergan should Nathan take?arrow_forwardYou are asked by the pharmacist to add 45 mEq of Ca Gluconate in an IV bag of D5W 1000mL. You have a concentrated vial of Ca Gluconate 4.4 mEq/mL, 50 mL. How many mL of this concentrated vial needs to be added to the IV bag?arrow_forward
- Based on the Henderson-Hasselbalch equation (shown below), calculate the pH when half of a solution of acetic acid is dissociated to acetate (the pKa of acetic acid is 4.76). A. 1.00 B. 3.76 C. 4.76 D. 5.76arrow_forwardHow much magnesium chloride hexahydrate (MW = 203.3 g/mol) is required to make a 500 mL solution at a concentration of 10 mmol/L? 203.30 mg O1.017 g O 1016.50 g 10.17 g 2.033 garrow_forwardA 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_forward