Humans have three types of cone cells in their eyes, which are responsible for color vision. Each type absorbs a certain part of the visible spectrum. Suppose a particular cone cell absorbs light with a wavelength of 512.nm. Calculate the frequency of this light. Round your answer to 3 significant digits.

Q: Calculate the pH at 25 °C of a 0.99M solution of potassium cyanide (KCN). Note that hydrocyanic acid…

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Q: ionisation energy

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Q: 1) Which one of the following compounds cannot react with another equivalent of itself in an aldol…

A: As per our guidelines we are supposed to solve only the first question. Please post other questions…

Q: 2. A 7.35 g sample of quinone (C6H4O2) is burned in a bomb calorimeter whose total heat capacity is…

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Q: Q.5. What substance is present if the FeCl, test gives a purple color? Which sample is the most…

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Q: PLAY STOP 4 Carbon-14 has a half life of 5730 years. How much carbon-14 would remain after 34380…

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A: Aspirin(C9H8O4) is acetylsalicylic acid or 2-acetoxybenzoic acid which is used as an analgesic to…

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Q: Use a table of Standard Reduction Potentials to predict if a reaction will occur between Cd metal…

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Q: Supplemental Question Q8 (to be answered under section C) Regarding your answers in the fifth column…

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Q: Given the reaction: A2(g) → 2A(g) ; K = 4.20 x 10-8 Calculate the concentration of A at equilibrium…

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Q: Ammonia is a weak base with a K of 1.8 x 10 . Calculate the initial molar concentration of a…

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Q: 02 The exponential notation of 385,500 to one significant figure is: A. 3.8x 10 B.3.8x 10 C3 10…

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Q: What volume of 1.772 M BaCl2 is needed to obtain 123 g of BaCl2?

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Q: Draw the structure of the missing intermediates and products in the following mechanism. Include all…

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Q: Consider the following alkyne. What is its systematic name? O (4S)-2-ethyl-4-methylhex-1-yne O…

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Q: 8. The graph shown represents the solubility of four compounds at varied temperatures. Which curve…

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Q: 5. If you left equal masses of iron and water out in the sun on a hot day, which one would be hotter…

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Q: In your own words, explain and make a reflection about the things that you need to know to start…

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Q: 2OF2(g)  ---->  O2(g) + 2 F2(g)             ∆H= -49.4 kJ   How much energy (in kJ) is released…

A: Oxygen difluoride decomposes into oxygen and fluorine. The equation for the balanced chemical…

Q: Calculate the Cal (kcal) in one cup of whole milk that contains 19 g of carbohydrate, 9g of fat, and…

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Q: Consider the coordination cation [Zn(NH3)4]*2 . How many possible geometric isomers are there? a.…

A: Given :  Coordination cation is [Zn(NH3)4]+2 in which 4 NH3 is coordinated to Zn+2 ion so…

Q: Quation -2 4.00 Le Ne and3.00Lf He, sodh at 298 K ond 2:00 atm, cuove mìxud isothemally ond…

A: Given data Temperature of gas : T=298 K Pressure of gas : P=2 atm Volume of Ne (Gas 1) : 4.00 L…

Q: Q.5. What substance is present if the FeCl, test gives a purpie color? Which sample is the most…

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Q: What are the reasons for the removal of salts from crude oil?

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Q: In an unknown sample, the amount of ascorbic acid (C6H8O6) is determined using coulometry. Analysis…

A: Given: Amount of the sample = 250.0 mg Time to reach endpoint with starch after reaction with…

Q: Following are the 'H and 13C NMR spectra for each of three isomeric ketones with formula CH340.…

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Q: Name: s,

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Q: Consider the following half-reactions: Half-reaction E° (V) Br2(1) + 2e → 2B1¯(aq) 1.080V Co2+(aq) +…

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Q: An atom with 2 electrons, 2 protons and 4 neutrons has an atomic number of ...

A: Given -> Number of electrons = 2 Number of proton = 2 Number of neutron= 4

Q: For each system listed in the first column of the table below, decide (if possible) whether the…

A: Here we have to determine change of entropy of the system in the following processes .

Q: 1. How many molecules are in 500.g of iron (II) phosphide? 2. Whats the mass (in grams) of 500 moles…

A: Given,  One mole of any substance contain Avogadro' s number of molecules.  Avogadro's number =…

Q: 006 008 00L 009 00s 00t 00€ 007 00L 007- Pressure (atmospheres)

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Q: Determine the %w/w of Na2CO3 in a 2.7518 g sample that was titrated by 41.92 mL of 0.6108 M HCl.…

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Q: Question 9 A student is attempting to identify the anion in an unknown solid. The student first…

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Q: Would you want to use a material with a high or low specific heat to make a pan to cook food…

A: Q = m C ∆T  Q = symbol of heat transfer(J)  C = specific heat  It is the amount of heat necessary to…

Q: Q.5. What substance is present if the FeCl, test gives a purple color? Which sample is the most…

A: Phenol substance is present when FeCl3 test gives a purple color. Reaction is occurring as :…

Q: 2X(aq) + Y(s) ⟷ Z(aq) K = 658 at 425 K When the concentration of X = 0.063 at equilibrium, what is…

A: Given equllibrium  equation  2X(aq)+Y(s)  <-> Z(aq) Given equllibrium constant K =658…

Q: The purity of a sample of K3Fe(CN)6 is determined using hydrodynamic voltammetry at a glassy carbon…

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Q: . Suppose a piece of metal at 90 °C is quickly transferred into a Styrofoam cup containing 212 grams…

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Q: Activated complex 2. According to the diagram, which of the following is Activeted complex correct?…

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Q: Draw the structure of the following and exposed each compound to oxidation:…

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Q: If there are 3, 000 molecules of sugar, how many grams are there?

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Q: When a 24.4 mL sample of a 0.357 M aqueous hydrocyanic acid solution is titrated with a 0.322 M…

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Q: A- methanal B- butanone C- benzaldehyde D- 3-methylcyclohexanone please draw condensed or line angle…

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Q: 1 add water to 100 mL of a 0.15 M NAOH solution until the final volume is 150 mL, what will the…

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Q: What is the entropy change when 0.17 moles of CHCI, vaporizes at 61.0 °C? [AH(vap) = 29.6 kJ/mol at…

A: When a liquid changes into the gas at its boiling point the entropy of the system increases.

Q: Which of the following statements are TRUE? Multiple answers: You can select more than one option…

A: The following statements are true a) , d), e) In statement a solid form of water has hydrogen bonds…