Q: Calculate the mass of 1.92 x 1018 atoms of Mg. O 1.08 x 10 10 g O 2.16 x 10 1º g O 8.96 x 10 5 g O 7...
A: Given Number of atom of Mg = 1.92 × 1018 Mass = ?
Q: (a) он (b) (c)
A:
Q: balanced using the smallest possible integers Sr(s) + P4(s) = Sr3P2(s)
A:
Q: The reaction 2NO (g) + Cl2 (2) A 2NOCI (g) has K = 100 at 300K. A particular equilibrium mixture at ...
A: The equilibrium constant of a reaction is the ratio of the product's concentration to the concentrat...
Q: Suppose the initial energy of a system (internal, kinetic, potential) is E the final energy is E, an...
A: First Law of Thermodynamics states that energy can be transformed from one form into another with th...
Q: major component of gasoline is octane C8H18 . When liquid octane is burned in air it reacts with ox...
A: We have to predict the moles of oxygen gas needed.
Q: 1pentanol + NaBr/H2SO4 -> 1-bromopentane Limiting reagent: 1-Pentanol Percent Yield: 64.5% The ty...
A:
Q: Chitosan is a linear polysaccharide that is derived from the shells of crustaceans. The monomer of c...
A:
Q: Suppose a 500. mL flask is filled with 1.1 mol of Cl,, 0.80 mol of HCl and 1.8 mol of CCI. The follo...
A: Calculating equilibrium composition of Cl2 from an equilibrium constant ?
Q: when a precipitation reaction occurs, the ions thet don't form the precipitate ?
A:
Q: Write the word “reducing” if the statement is correct, otherwise write “non-reducing”. 10. Galactos...
A: Reducing
Q: Overall Reaction: 2 NOB (g) → 2 NO (g) + Br2 (g) time, s [NOB|], M 0.0365 600 0.0274 1200 0.0206 180...
A:
Q: 1-pentanol + HBr -> 1-bromopentane Is this substitution reaction reversible? In other words, would ...
A: In a nucleophilic substitution reaction, a nucleophile substitutes a leaving group.
Q: What is the molar absorptivity of a 2.50 x 10-4 M solution if its absorbance at 550 nm is 0.500? The...
A:
Q: 3. Suggest a sequence of reactions suitable for preparing compound 2 from the given starting materia...
A: The solution is as follows:
Q: Question 10 Consider placing a piece of iron, Fels, into a 1 M solution of cadmium ion, Cd2*(ag). Se...
A: in this question find out the correct option here two electrodes are used, cadmium and Iron using ...
Q: QUESTION 21 A protein sample absorbs 50% of photons when the concentration is 0.2 M. The % of photon...
A: Given data : Protein absorb 50% photons when concentration is 0.2M When concentration is 0.4M then p...
Q: When the following equation is balanced, the coefficient of H,0 is Cа (9) + H,0 () > Са(ОН), (аq) + ...
A:
Q: time, s [NOB|], M 0.5 10 0.286 20 0.2 30 0.154
A: Decomposition of NOBr is given
Q: Complete the table below for calculating the molar mass of the compound nitrogen dioxide. Molar mass...
A: Molar mass of a molecule is equal to sum of atomic masses of all elements present in that molecule.
Q: What is the expected product of the reaction shown? HBr он Br Br II Br IV O II O IV O none of these
A:
Q: How many moles of Li are in 1.46 x 105 atoms of Li? O 412 mol O 4.12x 10° mol O 2.40 x 109 mol O 4.1...
A: We have to calculate the number of moles of Li is in 1.46×1015 atoms of Li. We know that 1 mole of a...
Q: An analytical chemist is titrating 210.3 mL of a 0.4900M Solution of butanoic acid (HC,H,CO,) with a...
A:
Q: True or False. Write the word “reducing” if the statement is correct, otherwise write “non-reducing”...
A: Lobry de Bruyn-van Ekenstein Transformation is the base or acid catalyzed transformation of an aldos...
Q: Determine if T/F. A process may lead to a negative ΔSuniverse
A: Thermodynamics is branch of chemistry that deals with the heat gain or heat lost by system.
Q: Which of the following compounds has the highest boiling point? tou OH OH OH HO. HO II IV Multiple C...
A: Boiling point of alcohols : 1). Alcohols can form hydrogen bonding(a strong intermolecular force). H...
Q: A sample of meat scrap weighing 2.000 g is digested with concentrated sulfuric acid and a catalyst. ...
A: The answer is given below
Q: 7. Order the following species from smallest to largest size. Ba, Se, Au, Ba2+, Se²-, P A. Se < P < ...
A: Atomic size is defined as the distance between the centre of the nucleus of an atom to its outermost...
Q: What is the molar mass of hydrogen phosphate, H3PO4, given the following molar masses? MH = 1.01 g/m...
A: What is the molar mass of hydrogen phosphate, H3PO4 ?
Q: Put the species in order, from strongest reducing agent (#1) to the weakest reducing agent (#6). You...
A: Oxidising agent: those species which oxidise others and reduces itself. Reducing agent: those specie...
Q: Give the number of peaks expected in the 'H NMR for the indicated protons in each of the following s...
A:
Q: Explain metal degredation and ceramic degredation briefly with the help simple drawings?
A: Answer is attached below
Q: In analytical chemistry, what is a standard method? Include any sources you used to answer this ques...
A: Solution: Definition of Standard method- In analytical chemistry for quantitative analysis, standa...
Q: Question 2 The concentration of a diluted "wine" sample was found to be 0.32 %(v/v) ethanol. Assumin...
A: Answe is attached below
Q: Please help me question C
A: A question based on NMR spectroscopy that is to be accomplished.
Q: Give the following information for the encircled element in the molecules as shown below 6) CH3CHCEN...
A:
Q: Step 1: N2O5(g) → NO:(g) + NO2(g) Step 2: NO2(g) + N2O5(g) → 3NO2(g) + O(g) Step 3: NO3(g) + O(g) → ...
A:
Q: 3. Calculate the concentration of Cl- in the 10mL unknown NaCl solution. The Ksp for Silver Chlorid...
A: Answer is below
Q: How many atoms are in 25.6 g tin? O 3.01 x 1023 atoms O 3.01x 1024 atoms O 6.02 x 1024 atoms O 1.30 ...
A: Given data: Mass of tin = 25.6 g Standard data: The molar mass of tin = 118.71 g/mol
Q: 1. To determine the potassium content of a sample, 1.275 g of the sample was dissolved in water and ...
A:
Q: ionic
A: In this question we have to explain iron(iii) oxide is which type of solid.
Q: A compound that is composed of only carbon and hydrogen contains 85.7% C and 14.3% H by mass. What i...
A:
Q: Pure water freezes at 0oC. What is the freezing/melting point of an aqueous solution containing 37.4...
A:
Q: V; E° MnO47Mn*" =+1.5T SRP: E° Fe Determine the following a. Balanced oxidation half-reaction b. Bal...
A:
Q: A kinetically-controlled
A: In order to answer this question we need to know the difference between kinetics (rate of reaction) ...
Q: what is the difference between organic compounds ionization and inorganic compounds ionization
A:
Q: a leaking UST has been contaminating the vadose zone with toluene for the last few years. calculate ...
A:
Q: U Rounding To The N.. O (46) AFRICAN HOM. E Kiasha Savage -Cla. G english to french- 1/10 A boron at...
A:
Q: Predict the product for the reaction shown. H2 Pd OH OH HO. HO. OH IV O II O IV
A:
Q: 2. The Lewis structure of acetonitrile is shown below. Sketch the bonding picture of this molecule u...
A:
-
- Calculate the degree of unsaturation.
- Assign the relevant peaks in the IR spectrum.
- Assign the peaks in the 13C NMR spectrum.
- Assign the peaks in the 1H NMR spectrum.
Step by step
Solved in 2 steps with 2 images
- Caffeine, C8H10O2N4 H2O (MW = 212.2 g/mol) has been shown to have an average absorbance of 0.644 for a concentration of 1.783 mg per 100 mL at 272 nm. A sample of 3.658 g of a soluble coffee product was mixed with water to a volume of 500 mL and a 25 mL aliquot was transferred to a flask containing 25 mL of 0.1 M H2SO4. This was subjected to the prescribed clarification treatment and made up to 500 mL. A portion of this treated solution showed an absorbance of 0.666 at 272 nm. Assumbe b = 1.0 cm. Calculate the % caffeine (w/w) in the sample.5answer the following with explanationSF POCck Cloa) 21314 which violate the atet rule Tosh up
- 10 Wavelength, 1. (nm) E (Red, µ.Mcm- ɛ(Yellow, µMr'cm¬1) Absorbance 500 0.0369 0.000549 0.405 430 0.00506 0.0167 0.474 An orange colored solution is prepared by mixing a red dye solution with a yellow dye solution and the absorbance was measured at the analytical wavelengths of 430 nm and 500 nm. The table provides the molar absorptivity for the red and yellow dye at each analytical wavelength. Calculate the concentration (in u.M) of the red and yellow dye in the mixture. [red] = [yellow] =22. To test a spectrophotometer's accuracy, a solution of 60.06 ppm K2Cr2O7 is prepared and analyzed. This solution has an expected absorbance of 0.641 at 350.0 nm. Several aliquots of the solution produce the following absorbance values. 0.640 0.638 0.640 0.639 0.640 0.639 0.638 is there any significant difference between the experimental mean and the expected value at a 99.9% confidence level? Yes because tcal>tcritical Yes because tcaltcritical No because tcal5. Can you explain why not all CuSO4 solution concentrations can be determined from spectrophotometer readings using wavelength absorption at 700 nm? Are there readings that are inaccurate? If not, why not, and if yes, why?Q3) A solution of Tryptophan has an absorbance at 280 nm of 0.25 in a 0.5 cm length cuvette. Given the absorbance coefficient of Tryptophan is 6.4 × 103 L Mol-1 cm-1. What is the concentration of solution?11ab please answer them allUnrounded Rounded ε∗,L/μmol 0.0259825 0.0260 Heres the data if needed: TZ # Concentration Absorbance at 430 nmnm 1 33.6480 0.931 2 25.2360 0.757 3 16.8420 0.210 4 8.41200 0.137 5 4.20600 0.122auDUIUance UI U.I JU ai 4JJ IIII III 1. UU CIII cuvclic. Calculate the molar absorptivity of the pigment at 453 nm? Q5) A student is tasked to determine the number of moles of H2SO4 (aq) in a 200 ml of an unknown solution. The student prepares a series of solutions with known concentrations of H2SO4 (ag) and measures the absorbance of each at an appropriate wavelength. These data are used to construct the calibration plot shown below. 1.00 0.80- 0.60 - 0.40- 0.20- 0.00- 3 x 10-4 6 x 10-4 Concentration (mol/L) If the absorbance of the unknown solution is 0.70, how many moles of H2SO4 (aq) does the 200 ml sample contain? AbsorbanceA student prepared four standard solutions of (NH4)2Fe(SO4)2 and measured their absorbance at 505 nm. She created a calibration plot with the best-fit line of y = 9372 x + 0.0539. She measured the absorbance of her diluted unknown sample solution as (4.69x10^-1) nm. If she prepared her diluted sample solution by diluting 10.00 mL of the original solution to a total volume of 50.00 mL with deionized water, what is the concentration of Fe2+ in her original solution? Answer in units of M. Note: Your answer is assumed to be reduced to the highest power possible.A group of students made 5 standard solutions and measured their corresponding absorbance values at a wavelength of 525.0 nm to generate the graph below. Absorbance of Standard Solutions to Find Concentration of Unknown X Solution 0.50 y = 75.9x + 0.0045 R? = 0.9946 0.40 %3D 0.30 0.20 0.10 0.00 0.001 0.002 0.003 0.004 0.005 0.006 Concentration of X (mole/L) The colorless reactants V and W form unknown X from the reaction: 2V + W 5 X A solution is prepared by mixing together the following: Volume 0.0150 M V (mL) Volume 0.0150 M W (mL) 6.00 4.00 This solution reaches equilibrium, and then is placed in a 1.00 cm wide cuvet and inserted into the spectrometer, producing an absorbance reading of 0.275 at a wavelength of 525.0 nm. Calculate Keg for the above reaction, including units. AbsorbanceSEE MORE QUESTIONS