Which of the following is evidence for the existence of dark matter? A large amount of light is often obscured due to invisible objects Objects closer to the Galactic center orbit with very high speeds The outer planets move faster than the inner planets Velocity curves show higher than expected values father out from the Galactic Center

Q: a) Select an arrow descriptor that best describes the relationship between the carbonyl derivatives…

A:

Q: Use the Kp values below to determine Kp values of the following reactions. N204(9) 2 NO₂(g) Kp =…

A: The given questions can be explained as :

Q: 12 A ribbon diagram of a zinc metallo-beta-lactamase protein is shown. Label the secondary…

A:

Q: white precipitate forms. What are the cations that may be present in the precipitate? a) Addition of…

A: Group I cations precipitate on addition of aq. HCl. The group I cations form white precipitates. The…

Q: Chemistry 1510 Tuclear Acid Equilibria Name: Nuclear Acid 1. (5 points) Identify the substance in…

A: a. Bronsted - Lowry caid b. Arrhenious acid

Q: d) How much carbon dioxide must be produced to release 7580 kJ of heat under standard conditions? e)…

A: The above reaction is an example of exothermic combustion reaction where carbon dioxide and water…

Q: Practice Questions: Lidocaine is a local anesthetic drug with a pKa of 7.7. ● • Based on the…

A: Given the pKa of Lidocaine, pKa = 7.7  Neutral water, H2O has a pKa of 7.0  pKa and Ka values are…

Q: Convert 0.301 mol of ammonium (NH) ions to equivalents. 0.301 mol NH = Convert 1.95 mol of sulfite…

A: Moles of ammonium (NH4+) ion = 0.301  Moles of sulfite (SO32–) = 1.95 mol

Q: Giving the following Fischer projection CH3 H- -NH2 H- -NH2 ČH3 a) Find all the stereoisomers and…

A:

Q: 2. Consider each set of quantum numbers (n. I, m, m.) listed below. Characterize each as VALID or…

A: Interpretation : We have to choose valid and invalid set of quantum numbers.

Q: 2. In a saturated solution of sodium chloride, the concentration of sodium ions is 0.750 M. Which of…

A: A saturated solution of NaCl is the solution in which the dissociation of NaCl(s) is in equilibrium.…

Q: A sample of glass, which has a specific heat capacity of 0.670 J-g¹c1, is put into a calorimeter…

A: Given,Cp for glass sample = 0.670 J g-1 ℃-1 T1=86.6 ℃ T2=20.1 ℃ mass of glass sample = m = ?

Q: For a two-solvent recrystallization, you should have one solvent (solvent # 1) in which your desired…

A: In the process of crystallization first the solid compound is dissolved (In solvent 1) at boiling…

Q: 5. Add 1 mL of 1.0 M HCl then using a scoopula add a small scoopula tip of solid NaCO, Observations…

A: Na2CO3 -Sodium carbonate. HCl -Hydrochloric acid. Reaction occurs between Sodium carbonate and…

Q: 11. If 100 mL of 1.00 M silver nitrate are added to 100 mL of 1.00 M potassium iodide in a…

A: When we heat a substance the temperature of the substance increases. The required amount of heat to…

Q: 7. What would the formula be for the following stick model? (A) C4H10 (B) C4H8 (C) CSH12 (D) C5H8

A:

Q: The mass of an average blueberry is 0.75 g and the mass of an automobile is 2.0x10³ kg. Find the…

A: Answer: Given data: Mautomobile=2.0×103kgMblueberry=0.75g

Q: The reagents that could effect the following conversion are: BH3, then H₂O2 and NaOH. CH3 H₂C ? 8-8…

A: Alkene gives an electrophilic addition reaction with borane. Alkene reacts with BH3 and then NaOH…

Q: Please give full explanation as well. I need this answer asap.

A:

Q: PLEASE ANSWER THIS

A: From the given data, the values for 1/[S], 1/V without Inhibitor, and 1/V with inhibitor is…

Q: 12.83 Consider the phase diagram shown for substance X. (a) What phase(s) is (are) present at point…

A:

Q: [2 A(g) + 3 B(g) = 4 C(aq) + 2 D(g)] Consider this chemical reaction. If Q > K, which of the…

A: Here for the given equilibrium reaction  2A(g)+3B(g) <=> 4C(aq) + 2 D(g)  Here Q > K ,we…

Q: 6. A solution was made by dissolving 17.5 g KCI in 136.0 g H₂O. The solution has a density of 1.07…

A: The molarity of a solution gives the idea of the concentration of a solution. It is expressed in the…

Q: Which of the following formulas is not correct? A) Na2O B) K3N C) Ca2F D) BaCl2

A: Check the formulas for each compound and then check whether it is written correctly or not.

Q: 2. Read the description of a chemical reaction below and translate it into a properly formatted…

A:

Q: 4. Metallurgy in the Auto Industry The following illustration appeared in a newspaper article (New…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: I need explanation  with hand written answer pl

A:

Q: what is the density, in gll, of ethene C2H4) gas at 25°c and 912 torr ? rida

A: The question is based on the concept of ideal gas equation. we have to determine density of the gas.…

Q: •132.4 mL of a 14.0% w/w H2SO4 solution (p = 1.066 gmL-) are diluted with pure water until the total…

A: The question is based on the concept of solution and ideal gas equation. We have to calculate the…

Q: A. Provide an efficient synthetic route to convert cyclohexanone to 1,2 cyclohexanediol B. Show an…

A: A.

Q: The following initial rate data are for the oxidation of arsenate ion by cerium(IV) ion in aqueous…

A: We have to find rate law and rate constant.

Q: Draw a structural formula for the symmetrical acid anhydride that forms from 2,3-dimethylbutanoic…

A: Amide are organic compound which have CONH2 functional group And anhydride are functional group…

Q: [Tutorial: Limiting reactant determination] This question will walk you through the steps of…

A: The chemical reaction is given as, CH4 + 2O2 --------> CO2 + 2H2O We need to find excess…

Q: Propose an efficient synthesis (with mechanisms) for each of the following transformations: a) b) OH…

A: These two are multistep synthesis reaction. Detail mechanistic pathway with transformation is shown…

Q: 26)lf at 298K for a certain reaction mixture AG >0 and AG K and the reaction is spontaneous. b.…

A:

Q: 34. Pick the true statements from the list below. * 1. Electrons occupy any vacant valence orbitals…

A: In this question, we have to choose the correct option for the given questions.

Q: Consider hydrobromic acid being titrated with sodium hydroxide. What is present at the equivalence…

A: Given that, hydrobromic acid (HBr) being titrated with sodium hydroxide (NaOH). We have to tell…

Q: Which of the following is the correct formula weight for Sodium Bicarbonate, NaHCO3?

A: Given NaHCO3

Q: 1. Which of the following is the ratio of magnesium ions to carbonate ions when magnesium carbonate…

A: Ionic compound: Ionic compound composed of cation which is positively charged (+charge) and an anion…

Q: Which of the following could enter into H-bonding interactions with water? (Select all that apply.)…

A: Molecules 1,2and 4 is able to form hydrogen bonding intercation

Q: A reaction that is accompanied by relatively large changes in energy and measurable changes in mass…

A: 1) In nuclear reactions, the changes occur at the nucleus of the reacting atoms. Hence, the products…

Q: 7. Which of the following are strong acids that will undergo complete ionization in water? Choose…

A:

Q: Which functional groups are present in the following molecule? 59. HO H -N. Alkene, ketone, amine,…

A: We have the structure of compound, we have to predict the functional group present in compound.