1) The boiling point of an aqueous solution is 101.98 ∘C. What is the freezing point? Consult the table of colligative constants.

freezing point:   °C

2)

Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent.

When 0.829 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 2.13 ∘C. Look up the freezing point and Kf constant for cyclohexane in the Colligative Constants table.

Calculate the molar mass of quinine.

molar mass:

g/mol

3)

If a 0.770 m aqueous solution freezes at −2.30 ∘C, what is the van't Hoff factor, i, of the solute?

Consult the table of K_f values.

i=

Consider the following reaction:

A(g)⇌2B(g)

Find the equilibrium partial pressures of A and B for each of the following different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm and that the initial partial pressure of A is 0.0 atm. Make any appropriate simplifying assumptions.

Kp = 2.0?

Kp = 1.4 x 10^4?

Kp = 1.2 x 10^5?

When 22.0 mL of a 2.08×10^-4M ammonium iodide solution is combined with 18.0 mL of a 5.92×10^-4M lead acetate solution does a precipitate form? _____ (yes or no)

For these conditions the Reaction Quotient, Q, is equal to _____

1.00 g mixture of Na2CO3and K2CO3was titrated with HCl. The analysis shows that there are 8.00x10-3moles of CO3-2 ions. Calculate the w/w% Na2CO3in the mixture.

please shows the steps

1.) The total pressure (P_T) os a sample of a gas collected over water at 13.0^oC is 0.588 atm. Determine the partial pressure (P_i) of the gas.

2.) Rearrange the ideal gas equation to solve for density (g/v). Hint: you will need to make a substitution for moles "n"

3.) Use your quation from (z) and the result from (l) to calculate the molecular weight of a gas if 303 ml of the gas, collected at 28^oC, weighed 0.347g.

Give the approximate chemical shifts, the expected peak multiplicities, and the

relative integration for methyl 2-bromopropionate (CH₃CHBrCO₂CH₃).

       chemical shift                    multiplicity                 relative integration

a.A peanut consists of 49.2% oil and 20.8% carbohydrate. (The remaining mass of the peanut is not combustible.) An average peanut has a mass of 0.75 grams. Determine the mass of oil and carbohydrate in one peanut. Then determine the amount of energy released (in kJ) when one peanut is burned

a.How many peanuts will it take to boil 1.00 liters of water?

Given the following information about Fe in aqueous solutions, what will be the ratio of (Fe(OH)₂⁺) to (Fe(OH)₃⁰) in solution at pH 6.0, 6.5, 7.0, 7.5, 8.0, 8.5?

Fe³⁺ + 2H₂O = Fe(OH)₂⁺ +2H⁺ logK = -5.7

Fe³⁺ + 3H₂O = Fe(OH)₃⁰ + 3H⁺ logK = -13.1

calculate the pressure in both atm and mmHg exerted if 20.0 mL of 0.10 M HCl reacts with excess magnesium in a 125 mL flask at 298 K. What mass of magnesium reacts? What would be the pressure if 1.0 M HCl is used? Assume the magnesium occupies no volume.

Write a balanced ionic equation for 1) the first acid-base reaction of maleic acid and sodium hydroxide, 2) the second acid-base reaction between C4H3O4-and sodium hydroxide. Finally 3) add the two equations together and cancel out spectator ions to get a net ionic reaction.

Standard copper potential = 0.339 V

% Error = [100 – (Theoretical/Experimental)] x 100

Please help me complete the table above.

Use Examples 4.16 to determine the  hybridization for each central atom ( respectively C, C, O, N)in the following molecule:

CH₃COONH₂

Group of answer choices

sp3, sp2, sp2, sp3

sp3, sp2, sp, sp2

sp3, sp2, sp , sp3d

sp3, sp2, sp3, sp3

If the sollubility of sodiym acetate (Molar Mass = 82 g/mol) is 76 grams per 100 grams of water, which of the following solutions would be considered supersaturated (holding more than the normal maxiym solution)? a.) 8.5 moles of sodium acetate dissolved in 1 L of water, b.) 1.8 moles of sodiym acetate dissoved in 300 mL of water, c.) 5.5 moles of sodiym acetate dissolved in 500 mL of water, or d.) 1.2 moles of sodium acetate dissoved in 200 mL of water? I would like to understand how to calculate these kinds of problems. Please explain step by step how I should go about solving this so that I may learn how to do it for myself. There is an answer on Chegg for this already but it doesn't appear to be accurate nor does it clarify what is going on for "understanding" sake as I tried to solve it for myself using the method there and it was more confusing than helpful. So, I am asking it an effort to gain a deeper and more accurate understanding.