In your own words, why is it false that the selection of the functional unit is primarily driven by the LCA practitioner’s preferences and does not significantly affect the LCA results?

Q: How many grams of NaAsO, should be weighed out to prepare a stock solution of 100 mg/L in 500 mL…

A: A numerical problem based on stock preparation, which is to be accomplished.

Q: What is the Rf if the solvent front moved 6.7 cm and the spot moved 4.2 cm from the point of origin?

A: Distance spot travel = 4.2 cmDistance solvent travel = 6.7 cmRf value = ?

Q: You are doing HPLC analysis to determine the concentration of vanillin in an artificial vanilla…

A: The full form of HPLC is high pressure liquid chromatography or high performance liquid…

Q: Mixing water and arterial fluid in the reservoir of the machine is called secondary dilution.  True…

A: mixture of arterial fluid  with water and /or supplemental fluids is called primary dilution.

Q: Data Table: (include units!) Unknown Acid # Unknown Acid #3 M Your NaOH concentration (YOU FOUND…

A: Trial 1 Concentration of NaOH solution = 0.10 M Volume of acid used = 17.0 mL = 0.017 L Total volume…

Q: Weight of Coin 1 (g) Weight of Coin 2 (g) Weight of Coin 3 (g) Weight of Coin 4 (g) Weight of Coin 5…

A:

Q: A student takes the following steps during an experiment: Measure 15mL concentrated HCl (student…

A: Possible source of error that may have contributed to the student's disappointing yield: 1. May be…

Q: From Experiment Correct Value % error AHdissolving |(kJ/mol) -24

A:

Q: I need help finding the %Composition for %cychohexane and %toluene. The formula (area of peak/total…

A: To determine: % composition for Cyclohexane and toluene

Q: A pool is filled with chlorinated water at a rate of 45.6kg/min. The mass fraction of water is 0.914…

A: Given: Flow rate of solution = 45.6 Kg/min. And mass fraction of chlorine = 0.086

Q: For the calculation of sd, shouldn't it be (0.97-1.09) and so on... because 0.97 = x and 1.09 =…

A: The general equation to find the standard deviation is: ∑i=2n(Xi-μ)2NwhereXi = Experimental valuesμ…

Q: The density of water varies with temperature.       T / oC            Density / g mL–1       19.00…

A: Linear interpolation is a method of curve fitting used to estimate the value of a function for an…

Q: Part C: Determination of the alcohol content of unknown liquor Stretien Volume (mL) Sample ТИШТИНА…

A: The objective of this question is to determine the alcohol content of an unknown liquor sample using…

Q: What if the second was parts per million instead of parts per billion?

A: (b) mass of Fe2+ = 2.443 mass of ground water = 1762 kgFormula to calculate concentration in ppm…

Q: 1 10 O O TRS MKR SRH 4. Junghwan wanted to determine which of the following skin care product which…

A: Paper chromatography is used to separate different chemical compounds based on their different…

Q: When working with very low concentrations, such as 0.000245 M, it can be more convenient to…

A: Molarity: It is the number of moles of solute present per Litre of the solution. The units of…

Q: 50 mg of granular salt is briefly stirred into a glass container of 1/5  liter volume filled with…

A: To calculate dissolved phase concentration , we would first calculate mg of salt dissolved in water…

Q: A student needs a 15% hydrochloric acid solution for a chemistry lab. How much 20% hydrochloric acid…

A: Given: Concentration of HCl in final solution required = 15 % Concentration of stock solution 1 = 20…

Q: Sodium sulfate solution is mixed with a solution of barium chloride. When 8.413 kg of sodium sulfate…

A: Answer:When solutions of two different substances are mixed and formation of precipitate takes…

Q: A food sample with a moisture content of 13.70% is found to contain 36.18% crude protein. What would…

A: A numerical problem based on percentage composition, which is to be accomplished.

Q: (vv)% = (10.0 mL150 mL) × 100 %Here, first solve the bracket,= (0.06666) × 100%now, do…

A: Interpretation: The concepts of v/v, w/v and molarity are to be explained.

Q: The primary standard substance must be less equivalent weight (or molecular Wt. ) False True

A: Primary standard substance are used to standardized the secondary materials or solutions which is…

Q: 1) Question: It is desired to prepare 1 liter of sulfuric acid solution in 6 norms. How many ml of…

A: Given: The mass percentage of H2SO4 is 98%. The normality of 1 liter of sulfuric acid solution is 6…

Q: g the practical, we will use diluted and minimal quantity of these chemica m to you. What other ways…

A: The question is based on precautions you should take while handling any chemical in lab.It is very…

Q: Two different laboratories within a company further studied the morantel recovery percentage in…

A:

Q: SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE AI | DON'T USE AI | DON'T USE AI | DON'T USE AI | 2.…

A:

Q: A new method for glucose determination in serum (Method A) is to be compared to the established…

A:

Q: Six measurements are obtained for the mass of water delivered by a calibrated volumetric pipet:…

A: According to the question, we have six measurements for the mass of water and we need to calculate…

Q: -). A new procedure for determining cholesterol in blood serum was used with a NIST standard sample…

A:

Q: Caffeine 140 Benzoic acid y = 66,392x R>=0.9995 120 y= 23.633x R2 =0.9999 100 80 60 40 20 b.... . .…

A: The formula for the uncertainty in slope is shown below: Standard errorS.Dm­ = m1R2 - 1(n-2)1/2…

Q: Tasks: 1. Check for Ionic balance.

A: Note; Since this question contains multiple subparts and it is not mentioned which subpart is to be…

Q: Data of candy (trial 1) Mass of candy: 6.1115g Concentration of NaOH (M): 0.09639 Volume of NaOH…

A: Interpretation: We have to determine the volume of NaOH required at the end point .

Q: Standardization of Hydrochloric Acid Solution Answer the concentrations in 3 significant figure. The…

A: Below attached file showing the details answer.  All the best .

Q: Type of Nut Almond Pecan Walnut Brazil Nut Hazel Nut Peanut Cashew Marshmallow Mass of Nut (mL)…

A: Here, each nut is burned in water and temperature of the water is increased. So each nut produces…

Q: What is another factor that can influence fractional distillation’s success other than the number of…

A: Distillation process involving conversion of liquid into vapours that subsequently condensed back to…

Q: Data Table1: Height (mL) for Stock Sugar Solutions XX Sugar Solution Concentration 0.0% Solution…

A: In the Sugar Solution Concentration Vs. Bulb Height Volume plot, we take  Sugar Solution…

Q: Why is the standardization carried out above room temperature?

A: Introduction Standardization of solutions is the process of determining the exact concentration of a…

Q: I need help on figuring out which are the four data points that can be considered outliers, below is…

A: The objective of the question is to identify the four outliers in the given data set of solution…

Q: When you walked in to Mrs. Bateast's lab today, you noticed that your partner group had a 0.05432 ml…

A: Given: Initial volume of mixture = 0.05432 mL. And volume of water added = 5.2 mL.

Q: From the calibration curve (yellow table calibration data) calculate the concentration of sugar in…

A: Given: