Let

Here are some questions with a bit of the data. if any can be answered from this information great! if not, could someone please explain how to find this information.

Using your absorbance data, calculate Ɛ, the molar extinction coefficient for your complex (A = Ɛlc) (refer to Eq 6)

PART III - Titrimetric Analysis of the Coordination Complex

[Cu(NH3)4]SO4.H2O (aq) +4HCl (aq) → Cu 2+ (aq) + 4NH + (aq) + 4Cl − (aq) +SO 2− (aq) +H2O (l) 44

Mass of the complex for both determinations using the stoichiometric ratio

Percentage purity of your complex

Based on the % purity, what is the correct range of values for the value of ε which you calculated earlier? (Hint: think about percentage error!)

Part III – Titrimetric analysis of the coordination complex

Concentration of HCl solution, 0.05 mol/L

-What are Serial dilutions?

how to do one, why we do one IN THE LAB and the proper procedure.

-EXPLAIN what a titer is and how to determine it.

-How to determine the concentration based on the dilution.

Hydrazine (N2H4) reacts with oxygen gas to form nitrogen gas and water.

A. Write a balanced equation for this reaction

B.How many grams of water are theoretically produced when 15.8g of hydrazine react with 18.3 g. of oxygen?

C.How many grams of the excess reactant remain?

D.9.16 g of water are actually produced. What is the percent yield for this reaction?

E. Using the percent yield from (d) how many kilograms of water can actually be produced from 292 L of hydrazine in excess oxygen? Dn2h2=1.02 g/mL

KEY PART that is TRICKY for me: (The vapor pressure of water is 23.78 mmHg at 25∘C)

A common way to make hydrogen gas in the laboratory is to place a metal such as zinc in hydrochloric acid (see the figure). The hydrochloric acid reacts with the metal to produce hydrogen gas, which is then collected over water. Suppose a student carries out this reaction and collects a total of 154.0 mL of gas at a pressure of 742 mmHg and a temperature of 25∘C. What mass of hydrogen gas (in mg) does the student collect? (The vapor pressure of water is 23.78 mmHg at 25∘C.)

Can someone please help me with this problem, because I am losing my mind. I thought the answer was going to be either 12.3 mg or 12.4 mg, but that's without factoring in the vapor pressure of water, and I do not know what to do with that information. Please help. Thank you.

What are the thermodynamics properties of a detergent molecule forming a micelle in an aqueous environment?

Please anwer fast!!
Please give work, please don't comment your a tutor and to email you. Please help me!! I know the answer is 5.53 but I need the calculations/work to correctly work through this problem correctly! Will rate better than lifesaver I need you chemistry genius's!!!

Confirm by calculation that the pH of CO2 saturated waterat 25C is 5.6, given that the CO2 concentration in air is 390 ppm. For CO2 Henry's constant is 3.4*10^(-2)M atm^(-) at 25C. The Ka for H2CO3 is 4.5*10^(-7) at that temp. (b) Recalculate the pH for a CO2 concentration of 560ppm, ie, double that of the pre-industrial age.

Which ions in the following list are not likely to be found in chemical compounds

Sr3+

Cs+

Ga4+

Br2-

Se2-?

select all that apply

Discussion about: Fertilizers

Fertilizers and pesticides are chemicals that have been used by homeowners and farmers to produce greener lawns and larger crops. These chemicals are proved to be harmful to humans and animals health. Some people don't eat food that was harvested from plants where fertilizers and other toxic chemicals were used, they like to consume "Organic Produces" only. What do you think from a scientific point of view? Do you agree with those who eat "Organic Produces" only and why? or why not?

PLEASE MAKE SURE TO TYPE THE ANSWER CLEARLY.

Best Regards,

A sample of water with a Fe2+ concentration of 500 ppm. Additionally Eh is 0.503 V and pH is 3.45. Will Fe(OH)3(s) stay in solution? What would be the equilibrium Eh at this pH?

Hydrofluoric acid, HF, has a K a of 6.8 × 10í. What are [H3O+ ], [Fí ], and [OHí ] in 0.790 M HF?

[H3O+] = (unrounded)

[F ] = M

[OHí ] = (Enter your answer in scientific notation.)

Find PH of solutions from list below

Bottle A : 200ml of 0.0750 M hcl (aq)

Bottle B: 200ml of 0.200 M methylamine (CH3NH2, PKb=3.36, molar mass = 31.0)

Bottle C 100g of solid Methylamine Hydrochloride ( Molar mass = 67.5)

a) Solution 1: 6.75 g of solid in bottle c dissolved in water to make 500 ml solution

b) solution 2: Mix 75 ml of solution 1 with 75 ml of bottle b

c) solution 3: Mix 15.0 ml of bottle a and 50 ml of solution 2

Please answer all three thank you!

Part A

To what volume should you dilute 155 mL of an 8.60 M CuCl2 solution so that 60.0 mL of the diluted solution contains 5.9 g CuCl2? Answer in mL

Part B

What is the molarity of an aqueous solution that is 5.69 % NaCl by mass? (Assume a density of 1.02 g/mL for the solution.)

Part C

Ocean water contains 3.5 % NaCl by mass. How much salt can be obtained from 304 g of seawater? Express your answer using two significant figures.

In a study, 2-MeV neutrons enter a target made of water and are gradually absorbed in the water.

Assume:

1. The neutrons don't interact with oxygen

2. Their capture cross section before they thermalize is 2.5 barns.

Calculate (for the neutrons):

a. Mean free path.

b. Linear momentum as they the target.

c. Velocity as they enter the target.

d. Calculate the neutron's lifetime in the medium (average time before they are captured).

Indicate all units.