1.2461 g of a wheat sample were analyzed to find out the protein content, by the method Kjeldahl, with an excess of H3BO3 in the distillate receiving vessel. Calculate the% nitrogen if 13.19 mL of 0.0962 M HCl were needed to reach the bromocresol green end point. (Pat N, 14.0)
Q: Of a 10%6 SDS solution in H20. The combined final solution would be 0.5M NaC1 and 1% SDS. If you are…
A: Molality is never equal to molarity. But the difference becomes lesser as the solutions become more…
Q: Quinoline is isolated from a reaction mixture by the process of steam distillation. A mixture of…
A: The numerical is based on Raoult's Law Relative lowering of vapour pressure = mole fraction of…
Q: Determine the values of Km and Vmax for the decarboxylation of β-keto acid given the following data.…
A: Those classes of proteins that mainly act as a catalyst in the living body by increasing the rate of…
Q: Calculate the cocentrations of acetic acid (pKa = 4.76) and sodium acetate necessary to prepare a…
A:
Q: hat mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to…
A: We have given [ C2 H4 O3 = 1.00 , Volume= 4.00mL, pH=4.0
Q: What mass of potassium nitrate KNO3 should be added to 255 g of water to prepare a 15% (m/m)…
A: Potassium nitrate is a chemical compound with the chemical formula KNO3. It is an ionic salt of…
Q: 75 mL of 0.2 M NaOH were added to 100 mL of 0.1M aspartate solution, pH=pl. What is the new pH? pKa…
A: The titration of the amino acid with a strong base like NaOH results in the loss of protons in a…
Q: As a technician in a large pharmaceutical research firm, you need to produce 200. mL of 1.00 M…
A: Given Values: pH of the potassium phosphate buffer required = 6.96 pKa value of the potassium…
Q: The doctor ordered Claforan 1400mg IM every 12 hours. The directions for the 2 gm vial state: Add…
A: The doctor ordered Claforan 1400mg IM every 12 hours. The directions for the 2 gm vial state: Add…
Q: You need to prepare an acetate buffer of pH 5.43 from a 0.621 M acetic acid solution and a 2.95 M…
A: At equilibrium 0.40875 - x moles of acid x moles of its conjugate base. Initial moles of CH3COOH…
Q: An antacid tablet (such as Tums or Rolaids) weighs 1.3259 g. The only acid-neutralizing ingredient…
A: Antacids are over the counter medications (OTC) which are used neutralize the acid present in the…
Q: A neonate patient weighing 3,821 grams is prescribed gentamicin 6 mg/kg in D5W for IV infusion. If…
A: Gentamicin is an antibiotic that is administered to treat bacterial infections such as pneumonia.…
Q: What is the molarity of a NaOH solution if 48.0 mLneutralizes 35.0 mL of 0.144 M H2SO4?
A: An acid–base reaction is a chemical reaction that occurs between an acid and a base. It can be used…
Q: The following data was collected for n-pentane and isopentane: Compound P, (kPa) n-pentane 282.9 at…
A: Multiple subparts are asked . I will answer the firt 3 subprts, as per guidelines. P1 = 955.9 kPa P2…
Q: Lycopene (C40H56) Is an antioxidant molecule that is minimum daily intake of 6.5 mg. a. Determine…
A: Lycopene is a plant nutrient with antioxidant properties.It`s the pigment that gives red and pink…
Q: 50X TBE is 87 mM Tris-borate and 4 mM EDTA at pH 8.3. What is the molarity of each of the chemicals…
A: Given In 50X TBE 87 mM tris-borate 4 mM EDTA pH 8.3
Q: In the electrolysis of aqueous sodium bromide, there are two possible anodic reactions: *2H2O(l)…
A: Water is reduced at the cathode in the electrolysis of NaBr. This occurs because water is more…
Q: At 39.9ºC, a solution of ethanol (XetOH = 0.9006, P * etOH = 130.4 Torr) and isooctane (P * iso =…
A: Raoult's law is generally a chemical law that states that the vapor pressure of a solution is basedc…
Q: Find AG and AS for the experiment with Urea Standard State/when it melts AG: Mass of Urea (in grams)…
A: Urea is a biomolecule that is obtained from the degradation of amino acids. It is comparatively…
Q: How much magnesium chloride hexahydrate (MW = 203.3 g/mol) is required to make a 500 mL solution ata…
A: MW = 203.3 g/mol Concentration = 10 mmol/L Volume = 500 ml solution = 500/100 L = 0.5 L
Q: A 0.578-g saltwater sample was titrated with 1.864 g AgNO3 solution to reach the endpoint of the…
A: AgNO3 and saltwater titration Weight of AgNO3 = 5g In 100 ml water solution is made. 1.864 g AgNO3…
Q: If you prepare a different prescription using 5 g of zinc sulfate [ZnSO4), how many mmols of zinc…
A: Milli mole iss 1000th part of mole. So 1 mole= 1000 millimoles or we can also write it as 1…
Q: Calculate the pH of a mixture of 0.25 M acetic acid and 0.20 M sodium acetate. The pKa of acetic…
A: The Hasselbalch-Henderson equation is used to estimate the pH of a buffer solution. The numerical…
Q: If I have a 20ml stock solution of BSA with a BSA concentration of 0.2%. How can I make two other…
A: The concentration of the stock solution of BSA is 0.2%. Percent solution is the mass of solute…
Q: The concentration of alcohol 1CH3CH2OH2 in blood, calledthe “blood alcohol concentration” or BAC, is…
A: Blood alcohol concentration or BAC is defined as the amount of alcohol in the bloodstream at a…
Q: Calculate acetic acid when it requires 44.82mL of a 0.145M NaOH solution to titrate 34.95 mL of our…
A: M1VI=M2V2
Q: Kaochlor, a 10% (m/v) KCl solution, is an oral electrolyte supplement administered for potassium…
A: Kaochlor is potassium chloride oral prescription which is used to treat and prevent low potassium…
Q: Given the balanced equation, Na2SO4(aq) + BaCl2(aq) → 2 NaCl(aq) + BaSO4(s), how many moles of BaCl2…
A: Balanced equation: Na2SO4+ BaCl2------> 2NaCl + BaSO4
Q: Bacteria that have a composition of CSH702N. Determine the BOD for 30mg/L, following the following…
A: Microbes, which are tiny and nearly invisible, have had a huge influence on society since the…
Q: You will be given a stock solution of the dye EVANS BLUE dissolved in distilled water whose…
A: Scientists use molarity to describe the concentrations and it tells us how much solute is dissolved…
Q: The solubility product of a metal hydroxide M(OH)2 is 8.65 × 10-6. What is the molar solubility of…
A: Ionic molecules are formed by the loss and gain of electrons to form respective positive and…
Q: At what pressure in atm does ethane (C₂H₆) have a density of 37.2 g/L at 75.0 °C?
A: The pressure of the ethane gas can be calculated by the ideal gas equation. PV = nRT Number of moles…
Q: Ethylene oxide is produced industrially from the reaction of ethylene with oxygen at atmospheric…
A:
Q: A sample of steel weighing 2.00 g is analyzed for Cr (AW 52.0). The Cr is oxidized into chromate…
A: In Baeyer's reagent, potassium permanganate is dissolved in an alkaline solution of violet color.…
Q: Describe the preparation of 2.00 L of 0.100 M glycine buffer, pH 9.0, from glycine and 1.00 M NAOH.…
A: Glycine-Sodium hydroxide buffer is a common buffer which has good buffering capacity. This buffer…
Q: To make up a solution of phosphate buffered saline (PBS), you need 10 mM Na2HPO4 (anhydrous) (FW:…
A: Convert the constituents in grams by multiplying with the respective molarity to convert grams per…
Q: What would be the working stock concentration (in molarity) if you diluted 250 uL of a stock…
A: Molarity is defined as the number of moles dissolves in 1000 ml of the solution.
Q: 2.2 Assuming that the final volume of the solution after the titration is exactly 5 mL, determine…
A: Molarity(M) = [moles of solute(n)]÷[litres of solution (v)] Atomic mass of sulpher= 32+(16×4) =96.…
Q: A +B C+D 1) Calculate AG for the above reac un and indicáte whether the reaction is favorable or…
A: Gibb's free energy∆G: It determines whether the given reaction will be Spontaneous or…
Q: Exactly 600.0 mg of pure sodium oxalate, Na,C,O, was dissolved in acid and titrated with a potassium…
A: Molarity is generally the moles of a solute per liters of a solution. It is also called the molar…
Q: Determine the values of KM and Vmax for the decar- boxylation of a β-keto acid given the following…
A: Introduction: Enzyme is a biological catalysts that means that it is a catalyst of life. It…
Q: (a) (' . Hill plots. Label the axes and indicate on both the plot above and the Hill plot where the…
A: We know that nitrous oxide are anesthetic gas that are used during surgery and are non volatile in…
Q: A 523.1-mg sample of impure KBr is treated with excess AgNO3 and 814.5 mg AgBr (187.774 g/mol) is…
A: Reaction between KBr and AgNO3 given as: KBr + AgNO3 --> KNO3 + AgBr
Q: The formula for a ciprofloxacin otic drop is given in the literature as follows10: Ciprofloxacin…
A:
Q: Given the titration curve of the hypothetical polyprotic acid X at 0.100 M concentration (pKa1=4.0,…
A: The given polyprotic acid has three pKa values that mean it has three ionizable groups.
Q: A sample of 0.6760 g of an unknown compound containing barium ions (Ba2+) is dissolved in water and…
A: The chemical reaction between barium ions and sodium sulfate is: Ba2++Na2SO4→2Na++BaSO4
Q: The essential oil found in cloves, eugenol, can be isolated by steam distillation because it is…
A: Clove oil has been used to help and resolve problems with stomach upset, pain and respiratory…
Q: e.2. What is the amount of each component needed, given the following media composition per liter of…
A: Introduction Lysogeny Broth (LB) Is A Nutrient-dense Media Predominantly Used For Bacterial Growth.…
Q: Calculate the number of milliliters (mL) of a solution which contains 16 g of BaCl2 per liter which…
A: Introduction Amount of sulfur=12% in 0.60g=12100×0.6=0.072gMolar mass of BaCl2=208.23g/molatomic…
1.2461 g of a wheat sample were analyzed to find out the protein content, by the method Kjeldahl, with an excess of H3BO3 in the distillate receiving vessel. Calculate the% nitrogen if 13.19 mL of 0.0962 M HCl were needed to reach the bromocresol green end point. (Pat N, 14.0)
Step by step
Solved in 2 steps with 1 images
- Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =Tirofiban (C22H36N₂O5S MWt = 440.6) is present as tirofiban HCI monohydrate MWt=495.1) at 0.281 mg/mL in a concentrated solution. (C22H36N2O5S.HCI.H₂O A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose s and adding 50 mL of concentrated solution. Sonya who weighs weighs 60 kg requires a tirofiban dose of 0.4 mcg/kg/min for 30 minute- What volume would remain after 30 minutes? Answer: 94.53 mL X The correct answer is: 236 mL80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pI. The solution is then titrated with 0.2M HCL to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCL needed to reach relevant pKa value and equivalence point(s)z Relevant pKa values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.
- Thimerosal Tincture USP contains 0.1% w/v thimerosal and 50% v/v ethyl alcohol. If the cap is left off of a 15-mL bottle of the tincture, and the ethyl alcohol evaporates leaving a final volume of 9.5 mL, what is the concentration of thimerosal in the evaporated solution expressed as a ratio strength?Tirofiban (C22H36N2O5S MWt = 440.6) is present as tirofiban HCI monohydrate MWt=495.1) at 0.281 mg/mL in a concentrated solution. (C22H36N2O5S.HCI.H₂O A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose solution and adding 50 mL of concentrated solution. Sofia who weighs weighs 87 kg requires a tirofiban dose of 0.1 mcg/kg/min for 12 to 24 hours. What would the infusion rate be (mL/h)? (Answer to 1 decimal place.)Tirofiban (C22H36N₂O5S MWt = 440.6) is present as tirofiban HCI monohydrate (C22H36N2O5S.HCI.H₂O MWt=495.1) at 0.281 mg/mL in a concentrated solution. A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose solution and adding 50 mL of concentrated solution. Sofia who weighs weighs 87 kg requires a tirofiban dose of 0.1 mcg/kg/min for 12 to 24 hours. What would the infusion rate be (mL/h)? (Answer to 1 decimal place.) Answer:
- Paclitaxel is used to treat ovarian cancer by infusion at a concentration of 0.6 mg/mL over 24 hours. A dose of 135 mg/m² has been prescribed for Sero. Sero is 1.06 m tall and weighs 92 kg. Paclitaxel comes in vials of 150 mg/25 mL. Calculate the volume of 5%w/v glucose solution that would be required to dilute the concentrated solution to prepare an paclitaxel solution of the required strength.Paclitaxel is used to treat ovarian cancer by infusion at a concentration of 0.6 mg/mL over 24 hours. A dose of 135 mg/m² has been prescribed for Sero. Sero is 1.06 m tall and weighs 92 kg. Paclitaxel comes in vials of 150 mg/25 mL. Calculate the volume of 5%w/v glucose solution that would be required to dilute the concentrated solution to prepare an paclitaxel solution of the required strength. Answer: You did not give the correct unit. The correct answer is: 333 mL XFor the following results of Thermodynamics of Borax Solubility, the volume of Borax solution titrated by HCI is 8.00 mL. Table 1. Volumes of hydrochloric acid required to titrate a saturated borax solution at varying temperatures. The hydrochloric acid was a solution standardized at 0.2912 M. Borax Volume added (mL) Temp. (°C) 8.00 8.00 8.00 8.00 8.00 HCI Volume (mL) 50.5 33.75 40.7 27.02 30.0 17.95 20.2 13.43 10.3 8.55 Using Thermodynamic formula (R= 8.31 J/K•mol) and the above results, (e) AS° = (J/K⚫mol) Type your answer...
- For the following results of Thermodynamics of Borax Solubility, the volume of Borax solution titrated by HCI is 8.00 mL. Table 1. Volumes of hydrochloric acid required to titrate a saturated borax solution at varying temperatures. The hydrochloric acid was a solution standardized at 0.2912 M. Borax Volume added (mL) Temp. (°C) 8.00 8.00 8.00 8.00 8.00 HCI Volume (mL) 50.5 33.75 40.7 27.02 30.0 17.95 20.2 13.43 10.3 8.55 Using Thermodynamic formula (R= 8.31 J/K⚫mol) and the above results, (b) What is the y-intercept of the best fitting line for this data? Type your answer...You are asked to prepare HEPES buffered saline with the following constituents: НЕРES 10mM KCI 5mM NaCl 135mM CaCl2 1mM M9SO4 0.6mM Glucose 6mM You have previously made up 100 mM stock solutions of HEPES, KCI, CaCl2, and M9SO4 and a 1M stock of NaCl. The MW of glucose is 180.16 g/mol What volume of HEPES would you require to make up 400ml of buffer?A 10.00-mL aliquot of unknown oxalic acid solution required 15.44 mL of 0.011 17 M KMnO4 solution to reach the purple end point. A blank titration of 10 mL of similar solution containing no oxalic acid required 0.04 mL to exhibit detectable color. Find the concentration of oxalic acid in the unknown.