Spiral galaxies appear white because they contain... (A) mostly young blue stars (B) mostly old blue stars (C) mostly young red stars (D) mostly old red stars (E) stars of all ages and colors

Q: I-ö: I 0-Ö: Z-I termine the molecular geometry arround each of the central atoms in the molecule…

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Q: A solution consisting of 5.00 g of an organic solute per 25.00 g of CCl, boils at 81.5°C under…

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Q: If a solution containing 59.943 g of mercury(II) nitrate is allowed to react completely with a…

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Q: Click the buttons below to construct the proper full electron configuration for a neutral Aluminum…

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Q: Which of the following is the major product of the reaction shown? OH dilute H2SO %3D IV

A: The reactant contains an alkene and alcohol, functional group. In the presence of an acid, the…

Q: Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to…

A: Given datas ; Pb(NO3)2 (aq) + 2 NH4I (aq) ---> PbI2 (s) + 2 NH4NO3 (aq)  Moalrity (Conc.) of NH4I…

Q: Thanks!

A: The given reaction can be written as:

Q: Given what you know about the specific heats of various substances, why are pots and pans made of…

A: Specific heat capacity : It is defined as the amount of heat required to raise the temperature of 1…

Q: Consider the reaction H2(g) + F2(g) = 2HF(g) at some temperature where the equilibrium…

A: The equilibrium reaction taking place is given as, => H2 (g) + F2 (g) -------> 2 HF Given:…

Q: 2. How many grams of urea (H2N-CO-NH:) must be added to 450 g of water to give a solution with a…

A: Use raoult law formula and get the answer

Q: Use the appropriate enthalpy of hydration values (in table below) and AHsolution = 0.91 kJ/mol for…

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Q: Match the appropriate octahedral crystal-field splitting diagram with the given spin state and metal…

A: Given metal ions and their spin states: high-spin Mn2+ low-spin Ni3+ We have to draw the…

Q: In the gaseous system, N2 + 3H2 → 2NH3 , if 0.20 atm of N2, 0.30 atm of H and 0.40 atm of NH; are at…

A: Equilibrium constant (Kp) – Equilibrium constant (Kp) equals to ratio of pressures of products and…

Q: Consider the reaction. A(aq) = 3 B(aq) K. = 1.59 x 10–6 at 500 K If a 5.40 M sample of A is heated…

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Q: Complete combustion of 4.80 g of a hydrocarbon produced 15.3 g of CO2 and 5.49 g of H2O. What is the…

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Q: Use bond energies to calculate the heat of reaction: H 0=C=0 + 2N–H H EN N FH + Н—о—н H H H kJ Bond…

A: We have to calculate the heat of reactionusing bond enthalpies                      Bond enthalpy…

Q: The [a] of pure quinine, an antimalarial drug, is -165⁰. a) Calculate the enantiomeric excess (EE)…

A: we have to determine  enantiomeric excess percentage of enantiomers  optical rotation for the…

Q: Solid barium acetate is slowly added to 175 mL of a 0.0500 M sodium carbonate solution. The…

A: Given that conc. of Na2CO3 = 0.0500 M [CO3–2] = 0.0500 M Ksp of BaCO3 = 8.1 × 10–9

Q: Click here to preview image Part A) Assign BOTH IR spectra below to TWO of the FOUR provided…

A: The given four molecules and the spectra are shown belowWe have to identify those two given spectra…

Q: would form. Use proper notation and place the cation first. a) Na* and S?- Please Note: Chemical…

A: Note: according to our guidelines we are supposed to answer only first three subparts

Q: 4. a) The hydrogens labeled in the structure below have different acidities. Assign the correct…

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Q: Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to…

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Q: During potions class, Prof. Snape asks the students to brew the "Pyromaniac's Elixir", a potion…

A: The reaction is the burning of Li. Amount of Li present = 1.5 kgVolume of the classroom = 13…

Q: Glucose (molar mass=180.16 g/mol) is a simple, soluble sugar. Glucose solutions are used to treat…

A: Molar mass of glucose = 180.16g/mol Mass of glucose = 233.8g  Volume of water = 500mL

Q: What is the correct order of acidic strength? 42. ОН ОН ОН O2N- -NO2 NO2 NO2 NO2 NO2 I II III a. I>…

A: Phenol is normally due to formation of resonating stable phenoxide ion. It can react with Sodium…

Q: 2. A 4.348 g sample of NaOH(s) is dissolved in 100. g of water in a calorimeter, the temperature…

A: In this question we have to calculate the heat of Reaction by the given data of the calorimeter.

Q: 6. The common fluorescent dye "fluorescein" exhibits an acid-base dependent change in its structure…

A: A pH-sensitive dye, fluorescein reacts to changes in the acidity (pH) of its surroundings by…

Q: AI(NO3)3 (aq) + 3 KOH(aq) -- Al(OH)3(s) + 3 KNO3(aq) (OR A I(N O3)3 (aq) + "3" KOH(aq) right arrow A…

A: The compound remains in ionic form in aqueous medium.  The solid compound remains as same.

Q: For a classical harmonic oscillator, at the center of the potential well ... E = K + V O E= V O E =…

A: For a classical harmonic oscillator, the energy at the center of the potential well (E) =K i.e.…

Q: The reaction: I" (aq) + Oci" (aq) → 10" (aq) + cI" (aq) was studied by using the initial rate…

A: Given equation is  I-(aq) + OCl-(aq) -----> IO-(aq) + Cl-(aq)  Give rate law expression is  Rate…

Q: Show that for a gas satisfying the Van der Waals equation a (P+) (v* – 6) = RT, where v * represents…

A: Van der Waals equation relates the pressure, volume (molar volume), temperature, number of moles and…