Solve for the pH of the solution made by combining 40.0 mL of 0.20 M nitrous acid and 20.0 mL of 0.10 M sodium hydroxide? The Ka of nitrous acid, HNO2, is 4.5x10-4.

Q: A salt solution stream flowing at 50 g/min contains 10% mass fraction NaCl. Calculate the molar flow…

A: Given that, The mass flow rate of the salt solution stream ms = 50 g/min The mass fraction of NaCl…

Q: 9. A student carried out a fractional distillation of an unknown binary (2-component) mixture from a…

A: Given is a graph, based on data from an experiment, in which 50 ml of the binary mixture was…

Q: As gas mixture consists of 75% (by volume) methane (CH4) and 25% (by volume) hydrogen sulfide (H2S).…

A: Mass concentration of any substance is defined as the mass of the substance contained per unit of…

Q: A 17.13 g mixture of sugar (C12H22011) and table salt (NaCl) is dissolved in 199 g of water. The…

A: The mass of sugar and table salt, m = 17.13 g The freezing point f the solution, Tf = -3.90 °C The…

Q: MODEL TEST THREE 1, The air is at temperature of 50°C and a pressure of 101.325 kPa , the humidity…

A:

Q: M Calculate pH of ionised. HCl solution, assuming to be completely 100

A:

Q: Indicate the concentration of each ion present in the following solutions: a) 0.35 M NaOH b) 0.55 M…

A:

Q: 4. A solution was prepared by adding 20.0 g of compound “A" to 125 g of water at 25 °C. The observed…

A: Given: Mass of compound A added to water is mA = 20 g and mass of water is mw = 125 g, The molar…

Q: Nitrous acid, HNO2, is used in the synthesis of organic dye compounds. If the hydrogen ion…

A: Nitrous acid is a weak and monoprotic acid. Monoprotic acids are those that are capable of donating…

Q: 2. A liquefied mixture has the following composition of 45 kg n-butane, 55 kg n-pentane and 20 kg…

A:

Q: An iron-carbon alloy initially containing 0.255 wt% C is exposed to an oxygen-rich and virtually…

A: Given data: Initial concentration of C = 0.255 wt % Surface concentration = 0.0 wt % Temperature =…

Q: An iron-carbon alloy initially containing 0.200 wt% C is exposed to an oxygen-rich and virtually…

A: Given data:The initial carbon concentration is The carbon concentration at the surface is The carbon…

Q: :Example 5.2. Estimate the theoretical volume of gas that will be generated in a sanitary landfill…

A:

Q: The chemical analysis of formation water as follow; Ion Concentration (ppm) Na 14,000 CI 12,000 Mg…

A: Write the expression for the water resistivity at 75 °F as follows: Rw = 12.4×10-4×C0.955 +0.0123…

Q: 1 mL of sulfuric acid is dissolved in 499 mL of water. The molar mass of H2SO4 is 98 g/mol and its…

A: Given: Volume of sulfuric acid =1mL Volume of water =499mL molar mass of H2SO4 =98 g/mol density…

Q: Liquid mixture of 600 moles of methanol and water containing 40 mole % methanol is subjected to a…

A: Let methanol be A and water be B. Moles of feed mixture, F = 600 mol Mole fraction of methanol in…

Q: An equimolar mixture of benzene and toluene is subjected to a simple batch distillation at…

A:

Q: A liquid solution initially containing 60% by mol of acetone and 40% by mol of water was…

A: Given, The moels of the feed, F = 100 mol The mole fraction of acetone in the feed, xF = 0.6 The…

Q: If you know that the moisture content Y=0.019, and the wet bulb temp. = 28 °C for dry air at 1 atm.…

A: Calculation:Dry bulb temperature:Using the psychrometric chart, we can find the dry bulb temperature…

Q: A solution contains 0.1 g of RbCl (Rubidium chloride, 120.921 kg/kmol) per the solution contained.…

A: Mass of RbCl present in the solution, mRbCl = 0.1 g Molecular mass of RbCl, MWRbCl = 120.921 kg/kmol…

Q: A semi-batch distillation unit is filled with 300 mol of a 80 mol% benzene-20 mol% toluene mixture.…

A:

Q: If 38.5 mL of lead(II) nitrate solution reacts completely withexcess sodium iodide solution to yield…

A: The molarity of the lead(II) ion in the original solution is to be determined.

Q: What is the molarity of KCL solution made by dissolving 35g of KCL solid in 1000 ml of DI water?…

A: by converting mass of KCL to moles and then putting all values we can calculate molarity

Q: What is the composition in atom percent (at%) of Cu in an alloy that contains 98.0 g Cu and 65.0 g O…

A: Given that  a alloy contain 98 g cu and 65 g Zinc

Q: Air is a homogeneous mixture of nitrogen and oxygen gases. The molar percent composition of air…

A:

Q: A vapor-liquid equilibrium system of benzene and toluene has a bubble point equal to 100 degC at 750…

A:

Q: The sulfur dioxide (SO2) stack-gas concentration from a fossil-fuel combustion plant was measured as…

A: Given, The concentration of sulfur dioxide is 5 μg/m3. The conditions are standard temperature and…

Q: An iron-carbon alloy initially containing 0.308 wt% C is exposed to an oxygen-rich and virtually…

A: Given:D=5.5×10-10m2sC0=0.308%Cs=0%Cx=0.231%t=6 h=21600 s

Q: One thousand kg/h of a 45 wt% acetone-in-water solution is to be extracted at 25oC in a continuous,…

A: a) The minimum solvent flow rate corresponds to an infinite number of equilibriumstages(1) Points…

Q: A 100-mole liquid containing 70mole % benzene contacts in a single stage with 150 mol of 30% vapor…

A: Given that a 100 mole liquid containing 70 mol% benzene contacts with 150 mol of 30% vapour of…

Q: To analyze the alcohol content of a certain wine, a chemist needs 1.36 L of an aqueous 0.199 M K 2Cr…

A:

Q: 2. A liquefied mixture has the following composition of 45 kg n-butane, 55 kg n-pentane and 20 kg…

A: Answer . Kindly check detailed answer in Step-2. Answer of (c) is 67.7018

Q: An alcohol-water solution contains 50% (volume) ethanol at 300 K. The densities of ethanol and water…

A: Given 50% by volume ethanol and 50% by volume is water Let's assume 1000 ml alcohol-water solution…

Q: To prepare a saturated solution of Potassium nitrate, we should dissolve 70g in 100ml of water at 50…

A: