8SO₂ + 16H₂S --> 3S₈ + 16H₂O

What is the maximum mass of S₈ that can be produced by combining 84 g of each reactant?

a. Show with the aid of a form of the Nernst equation that when using a pH sensitive glass electrode and reference electrode that the measured potential is proportional to pH.

b. Sketch a diagram of a pH sensitive glass electrode, label all parts and indicate the function of each part.

Calculate the standard entropy of vaporization of ammonia at 210.0K, given that the molar heat capacities at constant pressure of liquid ammonia and ammonia vapor are 80.8 J.K-1.mol-1 and 35.1 J.K-1mol-1, respectively, in this range.

When pure carbon is burnt in air some of it is oxidized to CO2 and some to CO. If the molar ratio of N2 to O2 is 7.18 and the molar ratio of CO to CO2 is 2, what is the percentage excess air used? Exit gases contain only N2, O2, CO and CO2.

A dryer is operated with a material containing 10% H2O (by mass) to a final dried material containing 5% H2O (by mass). The fresh air is mixed with recycled air and is blown over the solid. The fresh air contains 0.008 kg H2O/kg dry air and the recycled air contains 0.08 kg H2O/kg dry air. For 1000 kg of wet material fed to the dryer. Calculate (a) weight of H2O removed, (b) weight of dry air in the fresh air feed and (c) weight of dry air recycled.

Which one of the following ionic compounds is soluble in water?

NH4C2H3O2

AgCl

BaCO3

PbSO4

Making mixture solution:

Cupric nitrate : wt = 241.60 g/mol

SMS : wt= 250.278 g/mol

I want to make the mixture of solution that has cupric nitrate constant concentration at 10E-5 M, but SMS concentration will run from 0 to 10E-4M

So please help me make like 6 mixture solutions that have same concentration of cupric nitrate and SMS concentration run in that range. Thank you. Please show step by step

A) Answer as an isotope

1. Write the identity of the missing nucleus for the following nuclear decay reaction:

232 90Th→228 88Ra+?

2. Write the identity of the missing nucleus for the following nuclear decay reaction:

224 88Ra→42He+?

3. Write the identity of the missing nucleus for the following nuclear decay reaction:

?→237 93Np+42He+00γ

B) Write a balanced nuclear equation for the beta decay of each:

1. 25/11Na

2. 20/8O

3. strontium-92

4.iron-60

C)

1. Complete the following nuclear equation

116C→115B+−−−

2. Complete the following nuclear equation

3516S→−−−+0−1e

3. Complete the following nuclear equation

−−−→9039Y+0−1e

4. Complete the following nuclear equation

21083Bi→ −−−+42He

5. Complete the following nuclear equation

−−−→ 8939Y+0+1e

The number of different bond angles for nonpolar PBr₂F₃ is?

Organic Chemistry Lab

What is the content of caffeine in tea? Cite your sources.

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.210 M HClO(aq) with 0.210 M KOH(aq).

(a) before addition of any KOH

(b) after addition of 25.0 mL of KOH

(c) after addition of 30.0 mL of KOH

(d) after addition of 50.0 mL of KOH

(e) after addition of 60.0 mL of KOH

Will resulting solution be acidic or basic when combined with pure water?

NaCl

NaOBr

C2H5NH3NO3

LiHSO3

NH4ClO2

FeCl3

K2CO3

PLEASE SHOW ALL WORK

please answer the following questions

1. Discuss the following properties of water and why they are significant: (a) transmission of light; (b) maximum density at 4o C; (c) solvent properties and (d) surface tension

2. Explain the importance of bacterial flocculation to the function of wastewater treatment systems.

3. Explain why the insecticide dichlorodiphenyl trichloroethane (DDT) was banned in the United States in 1972.

4-. Understand the basic structure for a municipal drinking water treatment facility.  Define the components and explain how they improve drinking water quality.

1.) A diprotic acid has the following pK values: pK_a1 = 5.50, pK_a2 = 9.50

a.) At what pH does [H₂A] = [HA^- ]?

b.) At what pH does [HA^- ] = [A^2- ]?

c.) Which is the principal species at pH = 3.50, H₂A, HA^- , or A^2- ? Justify your answer using the Henderson-Hasselbach equation.

d.) Which is the principal species at pH = 7.5, H₂A, HA^- , or A^2- ? Justify your answer (don’t use Henderson-Hasselbach equation, this is a half-neutralized diprotic acid).

e.) Which is the principal species at pH = 9.8, H₂A, HA^- , or A^2-? Justify your answer using the Henderson-Hasselbach equation.

The compound known as butylated hydroxytoluene, abbreviated as BHT, contains carbon, hydrogen, and oxygen. A 1.376 g sample of BHT was combusted in an oxygen rich environment to produce 4.122 g of CO2(g) and 1.350 g of H2O(g). Insert subscripts below to appropriately display the empirical formula of BHT.

Insert subscripts below to appropriately display the empirical formula of BHT

CHO