23. Which of the following is not considered a possible reason for the disappearance of the Maya civilization? O a. disease b. earthquake c. war O d. famine

Q: 2 S + 3 02 --> 2 SO3 If 13.61 grams of SO3 can be created and 5.8 grams were actually created, what…

A: The given reaction is as follows: 2S + 3O2 → 2SO3 The theoretical yield of reaction = 13.61 g The…

Q: Select the correct image of the orientation of water molecules around each of the following:…

A: Answer:Same charges repel each other and opposite charges attract each other and sodium ion is a…

Q: The most likely location for an electron in H₂ is halfway between the two hydrogen nuclei. Select…

A: H2 is a very stable molecule. Which has two electrons in bondingorbital. It's impossible to remove…

Q: each of the species below, identify any cyclic conjugated system, then: Determine the number of…

A: Solution: According to Huckel's rule a cyclic, planar compound with 4n+2 electrons is to be…

Q: What is the concentration (molarity) of a solution created by dissolving 125.4 grams of Mg3P2 to…

A: Molarity =  moles / volume  So find the moles of given compound using moles =  mass / molar mass…

Q: How many formula units of H3PO4 are in 0.45 moles of H3PO4?

A: We have to multiply the number of moles by Avogadro's number.

Q: Rank the resonance forms shown from most significant to least significant. Briefly explain the…

A: Answer:

Q: There is only an option for one answer, which one out of the two works the best?

A:

Q: our Data Mass (g) of water (g) S4.573 S6.181 40.366 Mass (g) of metal 43.0S0 Too.1 Initial…

A: Given: specific heat of metal (Sm) of your data = 0.09796 Cal/g.oC = 0.4094 J/g.oC  specific heat of…

Q: 6. A 128g piece of Iridium at 95 C is dropped into a 45.2g of water at 17.3 C. The final temp of the…

A:

Q: Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition…

A: Since you have posted two questions , as per guidelines we can answer one per session . If you want…

Q: The Navier-Stokes equations are the set of differential (vector) equations describing the motion of…

A:

Q: How do you answer 4, 5, and 6? (This is a practice exercise; refer to first picture, please).

A: Compound 4 is sterol.

Q: more, contact your admin about your Office plan. 1. A galvanic cell is formed from Ni metal in a 1M…

A:

Q: A 0.119 mole sample of krypton gas occupies 15.0 L at a pressure of 2.07 atm. What is the…

A:

Q: Please answer all I do not need the explanations

A: 16. Rate, r is directly proportional to [L]0 Rate, r is directly proportional to [M]2 Rate ,R = k…

Q: Use the class data to solve both parts A and B please Class data Reaction 1) Ni(OH:)6^2+ with 4 en…

A:

Q: 9. Consider the equilibrium reaction: CH2CH2(g) + H2O(g) = CH3CH₂OH() at 350°C A 50.0 L tank is…

A: To find the number of moles of CH3CH2OH(I) present at equilibrium, we need to use the balanced…

Q: d. All of the above. 4. What is a vinegar solution? a. a strong acid b. a weak acid c. a strong base…

A: -> Vinegar is a chemical compound with the chemical formula CH3COOH .It is also called ethanoic…

Q: i need to know the answers to these with an explanation of how i got the answer

A: 2 (a) Introduction       Mass percent : The mass percent is used to             express the…

Q: Select all of the following that show a set of acids listed in correct order of increasing strength…

A: It is the tendency to donate proton It increases with the decrease in negative charge on oxyacids…

Q: I’m not really sure about these two questions. I am confused.

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: To determine the organic material in a dried lake bed, the percent carbon by mass is measured at two…

A: Given that : We have to find the standard deviations for the following data :

Q: The process of iron combining with oxygen to form rust is considered a chemical change because rust…

A: Rusting It is an oxidation reaction. The iron reacts with water and oxygen to form hydrated…

Q: An aqueous solution contains 0.22 M ammonia. One liter of this solution could be converted into a…

A: Buffer solution is the one that resists the change in pH value when small amount of either acid or…

Q: A sample of a compound that contains C, H, and O contains 41.38 % C and 3.45 % H. What is the…

A:

Q: Which of these has lowest viscosity as a liquid? CH3CH₂NH2 O CH3CH₂CH3 CH3CH₂OH CH3OCH 3 CH3CI

A: Viscosity is defined as the measure of the resistance of a fluid to flow in a free motion. The…

Q: Please specify what the correct answer is.

A: Given,Mass of neon, Ne atoms = 32.0 gRequired,                   Number of Ne atoms are present in…

Q: That's it Is that the answer?

A:

Q: There are 2 parts please give clear answers to both

A: Given data, Pressure = 2432 torr =3.2 atm Volume = 10800 mL = 10.8 L Temperature = 443 K Gas…

Q: can you explain this with an answer please?

A: To find: The mole ratio of S8 and Zn

Q: it cannot be both, i need one answer not two...

A: The second law of thermodynamics states that the entropy of the universe is alway increasing.  We…

Q: Glucose (C,H,206) solutions are frequently used as an intravenous (IV) solution to supply hydration…

A: A numerical problem based on quantitative analysis, which is to be accomplished.