discuss some ways in which the concentration of asolution can be expressed, and the kinds of informationwe can derive from the different units of measure.
Q: Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane…
A:
Q: A 25%w/w aqueous phosphoric acid solution has been prepared. Molecular weight of phosphoric acid is…
A: Given data 25 % w/w aqueous phosphoric acid solution. molar mass of phosphoric acid (solute) =…
Q: Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration…
A: Given: Density of mixture = 3.06 g/L. Temperature = 14 oC And pressure = 0.974 atm.
Q: 5. Arrange the following compounds in order of decreasing volatility: acetone, methanol,…
A:
Q: Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane…
A: In this question we will first find out the average molecular mass, given the density(d),…
Q: It is well known that the emission of greenhouse gases such as carbon dioxide presents a very grave…
A: Absorption capacity of speck boom = 3.8 tonnes / hectare 1 tonn = 1000kg , 1 hectare = 10000 m 2…
Q: A water-carbonating plant is available for use in the home and operates by providing carbon dioxide…
A: The Henry’s constant of carbon dioxide at 298 K is 3.01 × 103 kPakg/mol. Value of 1 atm in kPa = 1 ×…
Q: Be sure to specify sta K =
A: According to Le-chatlier principle if we change volume , temperature and pressure of the reaction…
Q: widely used in the compression/cooling circuits of refrigeration or air-conditioning systems. Since…
A:
Q: 13.3p. If you allow one pound of carbon dioxide to sublime (change from CO2(s) to CO2(g)) at room…
A: If you allow one pound of carbon dioxide to sublime (change from CO2(s) to CO2(g)) at room…
Q: Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration…
A:
Q: In an experiment, 0.500 grams of sodium bicarbonate were added to an evaporating dish and an excess…
A: Number of moles of a chemical compound is the term used to express the amount of the compound in a…
Q: Is this correct?
A: The heat of a substance is given as :
Q: the molarity of cl- in an aquoues solution which was %w/v 5.85% naCl , 11.1% cacl2 and 5.35% nh4cl…
A: Given, %w/v of NaCl = 5.85% %w/v of CaCl2 = 11.1% %w/v of NH4Cl = 5.35% What is the molarity of…
Q: Balance the chemical equation for the combustion of propane by first writing the homogeneous system…
A:
Q: Electrolytic manganese dioxide can be prepared from manganese carbonate ore by crushing, milling and…
A: Preparation of manganese dioxide from magnesium carbonate ore by crushing, milling and leaching the…
Q: what is the correct volume of 2.5M PhMgBr in THF is needed to completely react with 1.5ml of methyl…
A: The volume of 2.5M PhMgBr in THF is needed to completely react with 1.5ml of methyl benzoate, it is…
Q: A. Mole fraction of the solute with the higher number of moles, B. Molarity of the solution if it…
A:
Q: What is a marine calcifier and what are the effects of acidification on marine calcifiers?
A: Marine calcier : Biodiversity in ocean eco-system, is quite large. Starting from a very small…
Q: Use the following atomic masses (in g/mol): K = 39.1; Mn = 54.94; O = 16; H = 1; P = 30.97; C =…
A:
Q: Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane…
A: Given, Let mass of sample =1 L Density of mixture = 3.06gL Temperature = 14°C Pressure = 0.974 atm
Q: NaHCO3 (s) + HCl (aq) ---> NaCl (s) + CO2 (g) + H2O (l) Is the reaction balanced? What was in the…
A: If all the atoms of each type of element are equal then the reaction is said to be balanced. In the…
Q: + e H2O a) Write the equations for the balance by elements and the balance of electrons. b)…
A: Part a. and b. amount of carbon in 1 mole of substrate = 2(12) = 24 g amount of carbon converted to…
Q: 4S + 30, + 2H,0 2H,SO, Sulfuric acid is a very important chemical and an indicator of a nation's…
A: The complete balanced equation = 4S + 3O2 +2H2O →2H2SO4Mass of sulfur = 15.0gMolar mass of sulfur =…
Q: In an experiment, 0.500 grams of sodium bicarbonate were added to an evaporating dish and an excess…
A: Given reaction- NaHCO3 (s) + HCl (aq) ---> NaCl (s) + CO2 (g) + H2O (l)
Q: KAl3Si3O10(OH)2(s) + H+(aq) + H2O(l) -->Al2Si2O5(OH)4(s) + K+(aq) Balance the equation without…
A: In the balanced chemical equation, the total no of all the atoms should be same on both reactant as…
Q: For the dissolution of LiCl in water, ΔHsoln = -37 kJ/mol.Which term would you expect to be the…
A: The enthalpy change of solution is -37 kJ./mol which is the negative value that means its a…
Q: By pipot the stock solution of potassium permanganate (KM 1 O 4 ) from Question was transferred to…
A: The concentration of the resulting solution after dilution of stock solution can be calculated using…
Q: A student dissolves 11.0 g of potassium hydroxide (KOH) in 200. g of water in a well-insulated open…
A: The heat capacity is the ratio of the energy supplied in the form of heat to the rise in the…
Q: In an experiment, 0.500 grams of sodium bicarbonate were added to an evaporating dish and an excess…
A: Given: The reaction is as follows, NaHCO3(s) + HCl(aq) → NaCl(s)+CO2(g)+H2O(l) Mass of sodium…
Q: balance the following imaginary equation using real principles for a real equation _______ A2 +…
A: We are given an imaginary equation we have to balance it
Q: In the laboratory, a student was tasked to prepare a stock solution of HCl for titration. The…
A: Normality is defined as the number of gram equivalents of solute present in 1 litre of a solution.…
Q: In the "Méthode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine.…
A:
Q: Commercial perchloric acid (100.46 g/mol) 71% (w/w) with specific gravity of was diluted by taking…
A: Molar concentration : It is define the mole of substance in one Liter volume of solution.…
Q: What is meant by Centrifugation and How to calculate a desire RCF and rpm for the separation of…
A: Following are the appropriate answers of the given questions.
Q: Normality of 100 mL of 1.17% (w/v) CaC12 is . .
A: Normality is defined as the gram equivalent of solute dissolved in a liter of solution. The formula…
Q: Today, water pollution has been highlighted to be the major environmental concern, driven by the…
A: Answer-b Malaysia is abundant in water resources and available throughout the year.
Q: Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration…
A: #1: Given the mixture contains pentafluoroethane (C2HF5) and 111-trifluoroethane (C2H3F3). density…
Q: Calculate the normality of 0.2M Na2CO3 (M.wt = 106).
A: Normality is a measure of concentration equal to the gram equivalent weight divided by volume of…
Q: A student obtains the following data by following an experimental procedure to this one. Based on…
A:
Q: The need arises in a laboratory for 5000cm3 of an antifreeze solution consisting of 50mol% of HCl in…
A: The solution is given below in the image provided
Q: ,factory farm R downstream The above figure shows a river flowing downstream towards the sea. A…
A:
Q: An underfeed stoker feeds coal to a boiler at the rate of 100 kg/hr. The ultimate analysis of coal…
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Q: Chemical process industries use complex equipments. Some of these are fractional distillation…
A:
Q: Estimate the enthalpy of reaction h̄R for the dissociation process CO2 ⇌ CO + 1⁄2 O2 at 2200 K,…
A: Given dissociation process is, CO2 ⇌ CO + 12O2 Now, we have to estimate the enthalpy of reaction…
Q: Give an example of Calcination?
A: The process of converting an ore into oxide by heating it strongly below its melting point in a…
Q: The normal freezing point of n-octane 1C8H182 is -57 °C. In what temperature range is it a…
A: The importance of Gibbs energy is that it gives information about the spontaneity of the reaction or…
discuss some ways in which the concentration of a
solution can be expressed, and the kinds of information
we can derive from the different units of measure.
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- For the chemical equation 2HBr (aq) + Ba(OH)2 (aq) yields to 2H2O (L) + BaBr2 (aq) write the net ionic equation, including the phases.The mass of a beaker is 5.333g. After 5.00mL of a concentrated hydrochloric acid solution is pipetted into the beaker, the combined mass of the beaker and the hydrochloric acid sample is 11.229g. From the data, what is the measured density of the hydrochloric acid solution?A student determines the molar mass of a liquid unknown by the method used in this experiment. She found that the equilibrum temperature of a mixture of ice and water was 1.0 degrees C on her thermometer. When she added 11.1 g of her unknown sample to the mixture, the temperature, after thorough stirring, fell to -3.0 degrees C. She then poured off the solution through a screen into a beaker. The mass of the solution was 90.4 g. Kf=1.86 degrees C/m 1. What is the freezing point depression? 2. What is the molality of the unknown solution? 3. How much unknown liquid was in the decanted solution?
- A student determines the molar mass of a liquid unknown by the method used in this experiment. She found that the equilibrum temperature of a mixture of ice and water was 1.0 degrees C on her thermometer. When she added 11.1 g of her unknown sample to the mixture, the temperature, after thorough stirring, fell to -3.0 degrees C. She then poured off the solution through a screen into a beaker. The mass of the solution was 90.4 g. Kf=1.86 degrees C/m How much water was in the decanted solution? What did she find to be the molar mass of the unknown liquid, assuming she made the calculation properly?(a) A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the normality of this solution? (b) Water is added to dilute this solution to a solution of 3.03% by weight H2SO4 (SG= 1.020). What is the new normality of the resulting solution and how were they mixed? (Assume 100 mL of the original solution was used.)Solutions of cyanide salts are still widely used in the extraction of gold metal from its ores. It is thereforenecessary to regularly monitor the quality of the reagents used to make such solutions.The purity of a sample of solid potassium cyanide is determined as follows: 5.00 g of the impure potassium cyanide is weighed off, and quantitatively transferred into a100.00 mL volumetric flask, dissolved and made up to the mark. A 10.00 mL portion of this solution is pipetted into a conical flask, and titrated with a 0.200 MKMnO4 solution. The endpoint of the titration is determined when the colourless solution in the conical flask turns abright pink due to the presence of excess permanganate ions. The average titration value is 20.69 mL of the KMnO4 solution.The reaction stoichiometry is as follows: 2KMno4(aq) + 3KCN(aq) + H2O(l) → 2MnO2(s) +3KOCN(aq) + 2KOH(aq) 1.1 Determine the percentage purity of the potassium cyanide.
- One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution like this: FeCl3(aq) + 3 AgNO3(aq) 3 AgCl(s) + Fe(NO3),(a9) The chemist adds 56.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 2.8 mg of silver chloride. Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits. mg L Submit Assignment Continue Accessibility Privacy O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use 888 %23 5 6 2 3 E R. G…Question 2. Alldredge studies the properties of marine snow in Ref. [2]. The figure below is adapted from this work, and plots the mass of different particles of fecal marine snow as a function of their volume on a log-log scale. In[Particle Mass M (ug) / (1 µg)] 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 ● 0 Fecal snow Line of best fit 2 3 4 5 In[Particle Volume V (mm³) / (1 mm³)] 6A cake requires 3 eggs, 4 cups of flour, 2 cups of sugar, and 1 stick of butter. In the refrigerated pantry, a chef has the following available: · 46 sticks of butter • 62 eggs · 50 cups of flour · 37 cups of sugar Which is the "limiting reagent" (the limiting ingredient) that will run out fırst and how do you know? Justify your answer mathematically.
- A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 69.32 g.L The geochemist also measures the concentration of salt in several nearby non-isolated lakes, and finds an average concentration of 5.02 g⋅L¯¹. Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate the percentage of Lake Parsons which has evaporated since it became isolated. Be sure your answer has the correct number of significant digits.A student was asked to determine the concentration of ammonia, a volatile substance, in a commercially available cloudy ammonia solution used for cleaning. First the student pipetted 25.00 mL of the cloudy ammonia solution into a 250.0 mL conical flask. 50.00 mL of 0.100 mol L-¹ HCl(aq) was immed added to the conical flask which reactedwith the ammonia in solution. The excess (unreacted) HC1 was then titrated with 21.50 mL 0. 050 M Na2CO3 (aq). Calculate the concentration of the ammonia in the cloudy ammonia solution.Insoluble Li2CO3 (s) precipitates when solutions of Na₂CO3(aq) and LiCl(aq) are mixed. Na2CO3(aq) + 2 LiCl(aq) → Li₂CO3 (s) + 2 NaCl(aq) A,HⓇ = ? To measure the enthalpy change, 100. mL of 0.65 M Na₂CO3(aq) and 100. mL of 1.3 M LiCl(aq) are mixed in a coffee-cup calorimeter. The temperature of the mixture rises by 1.3 °C. Calculate the enthalpy change for the precipitation of Li2 CO3(s) in kJ/mol. (Assume the density of the solution is 1.0 g/mL, and its specific heat capacity is 4.2 J/g. K.) kJ/mol Li₂CO3 A, H = =
