For the diprotic weak acid H2A, K a1 = 3.1 × 10 − 6 and K a2 = 7.2 × 10 − 9 . What is the pH of a 0.0500 M solution of H 2 A ? pH =

What are the equilibrium concentrations of H 2 A and A 2 − in this solution?

[ H 2 A ] =

[ A 2 − ] =

Which 3 of the following process techniques will enhance the number of die from each wafer ?

12. Liquid nitroglycerin is a shock sensitive compound that produces gases in an exothermic (heat releasing) reaction shown below.

4C₃H₅(NO₃)₃ (l) → 6N₂(g) + 10H₂O (g) + 12CO₂ (g) + O₂ (g)

If 16 ounces (454 g) of nitroglycerin is detonated in a 0.500 L container and the temperature of all the gases produced is 175 oC, what is the total pressure in the container?

(a) 417 atm

(b) 805 atm

(c) 1070 atm

(d) 208 atm

Please check it out within 30 minutes. Please provide explanation or working so I can check with my answer.

Question: In a study of the system, Cl2(g) + Br2(g) 2BrCl(g), several different reaction mixtures were prepared, placed in a 15.00 × 10–3 m3 container, and allowed to reach equilibrium at 350 K. Despite having different starting compositions, three of the four mixtures had an identical composition at equilibrium. Which one of the systems has a different equilibrium composition than the others?

Select 1:

a. System 1: 0.100 moles of Cl2, 0.000 moles of Br2 and 0.600 moles of BrCl

b. System 2: 0.250 moles of Cl2, 0.150 moles of Br2 and 0.300 moles of BrCl

c. System 3: 0.400 moles of Cl2, 0.300 moles of Br2 and 0.000 moles of BrCl

d. System 4: 0.300 moles of Cl2, 0.250 moles of Br2 and 0.250 moles of BrCl

The energy needed for the following process is 1.960 × 104 kJ/mol:

Li(g) → Li3+(g) + 3e−

If the first ionization energy of lithium is 5.20 × 102 kJ/mol, calculate the second ionization energy of lithium—that is, the energy required for the process:

Li+(g) → Li2+(g) + e−

A hydrogen-like ion is an ion containing only one electron. The energies of the electron in a hydrogen-like ion are given by

En = −(2.18 × 10−18 J) (Z2)(1/n2)

where En is the energy of the electron in the hydrogen-like ion, n is the principal quantum number, and Z is the atomic number of the element.

Second ionization energy of lithium:   kJ/mol (Enter your answer in scientific notation)

1. We wish to produce a product B from a reactant A in a PFR with Q = 4 L/min and CA0 = 2 mol/L. However, another reaction is also occurring, forming an undesired product C. (Both reactions are irreversible, 1st order, with kB= 0.5 min-1 and kC = 0.1 min-1)

. Assuming parallel reactions A -> B and A -> C, calculate the reactor volume necessary to achieve

NiO(s)+CO(g)⇌Ni(s)+CO2(g)
Kc=4000.0 at 1500 K

If a mixture of solid nickel(II) oxide and 0.12000 M carbon monoxide is allowed to come to equilibrium at 1500 K, what will be the equilibrium concentration of CO2?

why does double focusing mass analyser provide higher resolution than magnetic sector mass analyser?

calculate the ratio of (M+1)+ to M+ peak height for C4H10NO

Calculate the ratio of (M+2)+ and (M+4)+ to M+ peak height for CHBr3.

Discussion about: Nuclear Energy

There are different public opinions about using nuclear energy in producing electrical energy. Nuclear reactors are associated with harmful nuclear radiation and there is a problem of the storage of the nuclear waste. Discuss this issue from a scientific point of view giving your stand and explain why.

Please make sure to type it.

What is the relationship between photons of increasing wavelenght and frequency?

What is the relationship between photons of increasing frequency and energy?

wha is the relatioshi between photons of increasin energy and wavelength?

1. An equilibrium mixture from the following reaction was found to contain 0.225 mol/L of SM , 0.306mol/L of SR, and 0.306 mol/L of HM. If the volume of the reaction vessel was suddenly doubled while the temperature remained constant, what would be the new equilibrium concentrations? (NOTE: SM_(g) + SR _(g) ⇌ HM_(g))

The compound P₄S₃ is used in matches. It reacts with oxygen to produce P₄O₁₀ and SO₂. The unbalanced chemical equation is shown below:

P₄S₃(s) + O₂(g) --> P₄O₁₀(s) + SO₂(g)

What mass of SO₂ is produced from the combustion of 0.401 g P₄S₃?

100 mL of buffer solution that is 0.15M HA (K_a= 6.8x10^-5) and 0.20M NaA is mixed with 15.2mL of 0.35M NaOH. What is the pH of the resulting solution?

for question 3 im getting 96.234 sec but it says its wrong but close to the answer.
for activation energy.. i get 24.6 kj/mol but its wrong

3) You mix together in the proper manner the following VOLUMES:
0.0100 M Potassium iodide...14.7 mL
0.0010 M Sodium thiosulfate...5.6 mL
Distilled water...22.7 mL
0.0400 M Potassium Bromate...11.7 mL
0.100 M Hydrochloric acid...5.6 mL
Using the rate constant and rate equation from problem 2),
exponent c is 1.92
exponent constant K 4.7125
CALCULATE the time to turn blue...__________________ sec (c)

4) A plot of log Rate vs 1/T gives a best straight line which goes through....
1/T = 0.00300, log rate = -4.46
and 1/T = 0.00352, log rate = -6.00.
CALCULATE:

The Slope of the line...is ________-2961.53_____ (d)

The Activation Energy (Ea) (Kj/mol)...________________(e)
thanks in advance