Calculate the freezing point and melting point of a solution containing 10.0 g of naphthalene (C₁₀H₈) in 100.0 mL of benzene. Benzene has a density of 0.877 g/cm³

Determine the molarity of each of the following solutions:

(d) 2.76 kg of CuSO4?5H2O in 1.45 L of solution

(e) 0.005653 mol of Br2 in 10.00 mL of solution

(f) 0.000889 g of glycine, C2H5NO2, in 1.05 mL of solution

Please show me above answers step by step

thanks...

Write the chemical formula or name the following complexes and draw AND LABEL all possible isomers (ignore counter-ions in drawing).

a. [CoCl3(OH2)3]-

b. [MoCl(NH3)5]SO4

c. diaquotetracarbonylruthenium(III)

d. diamminedichloroplatinum(II)

Compare the energy available from the combustion of a given volume of methane and the same volume of hydrogen at the same temperature and pressure. (Standard enthalpy of formation of methane is -75 kJ/mol)

Convert the following equivalents to masses/volumes (g or mL):
1. 1.5 equivalents of KOH
2. 1.4 equivalents of RCO3H
3. 1.2 equivalents of NaOH
4. 0.2 equivalents of NaOH
5. 3.5 equivalents of ethyl bromide

1. Use information in the balanced chemical formula below to answer the next 4 questions

   C2H6                    +       7   F2             →           2 CF4             +         6 HF

mw = 30.06 amu                           mw = 37.99 amu                           mw = 88.00 amu               mw=20.00 amu         

a) How many moles of C2H6 would be consumed when reacted with 9.24 moles of F2?

b) If you consume 7.50 moles of F2, how many grams of HF are produced?

c) If 10.32 g of HF are generated, what mass of C2H6 was utilized as starting material?

d) What is the number of molecules of F2 required to completely consume 25.0 g of C2H6?

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