Determine the [OH-], [H+], pH, and pOH of each of the following: a. 0.29 M Sr(OH)2 b. A 2.50 L solution prepared by dissolving 15.6 g of KOH in distilled water. c. A 250 ml solution prepared by dissolving 42.1 g of NaOH in distilled water d. A 300 ml solution prepared by dissolving 5.00 g of HI in 300ml of a 0.796 M solution of HNO3?

Which conformer is more stable and by how much?

1)equatorial 2-methylcyclohexanone 2) axial 2-,ethylcyclohexanone

for each conformer, draw out the expected major product (with stereochemistry) for addition of methyl magnesium bromide.

Question 2 options:

For the reaction  CH4 + O2 →CO2 + H2OCH4 + O2 →CO2 + H2O

what are the coefficients for each reactant or product?

a. CH₄

b. O₂

c. CO₂

d. H₂O

Question 3 (2 points)

Question 3 options:

For the reaction  NaOH + AlCl3 →NaCl + Al(OH)3NaOH + AlCl3 →NaCl + Al(OH)

what are the coefficients for each reactant or product?

a. NaOH

b. AlCl₃

c. NaCl

d. Al(OH)₃

Question 4 (2 points)

Question 4 options:

For the reaction  H2O2 →O2 + H2OH2O2 →O2 + H2O

what are the coefficients for each reactant or product?

a. H₂O₂

b. O₂

c. H₂O

Question 5 (2 points)

Question 5 options:

For the reaction  FeSO4 + Na3PO4 →Fe3(PO4)2 + Na2SO4FeSO4 + Na3PO4 →Fe3(PO4) + Na2SO4

what are the coefficients for each reactant or product?

a. FeSO₄

b. Na₃PO₄

c. Fe₃(PO₄)₂

d. Na₂SO₄

Question 6 (2 points)

Question 6 options:

For the reaction  C6H12O6 + O2 →CO2 + H2OC6H12O6 + O2 →CO2 + H2O

what are the coefficients for each reactant or product?

a. C₆H₁₂O₆

b. O₂

c. CO₂

d. H₂O

True or False

1. Zaitzeff's rule is usefull for predicting the regiochemistry of electrophilic addition reaction ?

2. Markovnikov's Rule is usefull for predicting the regiochemstry  of electrophilic addition reaction ?

3. A Alkene bromination reaction is an example of an syn addition ?

4.A Hydroboration-Oxidation reaction is an example of an anti-addition ?

5. Carbocations can combine with a nucleophile, eliminate, or rearrange ?

6. A steroespecfic reaction will prdouce only a certain set stereoisomoers due to the reaction mechanisim. ?

In an experiment like the one you will complete, a student collected the following data. Use this information to complete the questions below. YOU MUST SHOW ALL CALCULATIONS.

Change in Mass of Anode: -0.023 g

Change in Mass of Cathode: +0.019 g

Average Current: 38.7 mA

Time of Electrolysis: 1860 s

d) Using the average of the change in mass of copper from the electrodes in the electrolytic cell, calculate the molar mass of copper.

Glucose, Sucrose, Fructose, and Amylose. Which carbohydrate listed can be hydrolyzed, and why?

Perhaps you recall that when table salt, NaCl, is added to water, the freezing point of water is lowered. Consider a system composed of a mixture of 2.5kg of ice and 50g of liquid water and a small, separate container of finely powdered salt. This physical system is contained in a fully insulated container that prevents all thermal interactions with the environment. Both the salt and the ice-water mixture are initially at the freezing point of water, 0 °C. The salt is then added to the ice-water mixture, and the system of ice-water and salt is allowed to come to thermal equilibrium. The final equilibrium temperature is less than 0 °C.

Use the Energy-Interaction Model Preview the document to predict if there will be a greater or lesser amount of ice in the final equilibrium state than in the initial state before the salt was added. Your explanation should include a complete Energy-System Diagram. [The simplest way to model this physical system is with one thermal energy system for everything and one bond energy system, i.e., in terms of the model, it is not useful to distinguish between the various chemical components in order to answer this particular question.]

A solution is made by combining 15.0 mL of 17.0 M acetic acid with 5.50 g of sodium acetate and diluting to a total volume of 1.50 L.

what is the pKa?

what is the pH?

A quantity of 4.50 g CaC2 is reacted with an excess of water at 298K and atmospheric pressure. CaC2 (s) + 2 H2O (l) --> Ca(OH)2 (aq) + C2H2 (g) Calculate the work done in Joules by the Acetylene gas against the atmospheric pressure.

Reference https://www.physicsforums.com/threads/calculate-the-work-in-joules-by-the-acetylene-gas.794536/

Molar Mass by Freezing Point Depression I am doing a latenite lab on Molar Mass by Freezing Point Depression. I have asked this question on Course Hero and twice on Chegg and the tutors keep giving me different answers. Sample 2 has a van't Hoff factor of 2. It began freezing at -3.6. I added 2 g of the unknown to 10 mL of water. I was given that the Kf for water is 1.86.

Calculate the molar mass of FP sample 2

The vapor pressure of liquid benzene is 17.7 kPa at 30 ºC and 37.7 kPa at 50 ºC. a) Calculate the enthalpy of vaporization of benzene. b) Estimate the vapor pressure at 10 ºC [use your answer from part (a)]. c) Estimate the normal boiling point of benzene (use a vapor pressure of 1 bar and use the result from part (a)]

1. Olive oil has a saponification value of 190 mg KOH per gram. This means that it takes 190 mg of potassium hydroxide to react completely with 1 g of olive oil.

(a) What is the mole ratio for the reaction of a triglyceride with KOH?

(b) Divide 0.190 g of KOH by its molar mass to calculate the number of moles of KOH that will react with 1 g of olive oil.

(c) Use the answers to (a) and (b) to determine the number of moles corresponding to 1 g of olive oil. Divide 1 g by this number of moles to calculate the average molar mass (g/mole) of olive oil.

1) Explain why there are so few metallic materials with one-dimensional bands. Naming and describe the type of distortion responsible for this.

2) Why are the superconducting critical temperatures of conventional superconductors often highest when the material has the apparently contradictory features of having strong bonds but poor orbital overlap between atoms associated with the conduction band?

calculate the mole fraction of a fractional distillation? How do I find the mole fractions of different distillations given only the refractive index, the temperature and which the distillation was acquired, and the makeup on the original solution before distillation?

the lab manual says to use P= (px * mol frac x)+(py * mol frac y)

but i don't know how I can find their partial pressure given that I don't know their mole fractions of the distillation since partial P=mole frac * vapor pressure.