Question

Inorganic questions--please show work and only answer if you truly understand it:

Please show all work and answers on this page if at all possible.

5. Arrange the following solutions in order of decreasing freezing point, and explain your reasoning: 0.50 m HCl, 0.50 m glucose, 0.50 m acetic acid.

6. The alcohol content of hard liquor is normally given in terms
of the “proof”, which is defined as twice the percentage by volume
of ethanol (C_{2}H_{5}OH) present. Calculate the
number of grams of alcohol present in a glass of of 75-proof gin
(assume a 4 oz glass). The density of ethanol is 0.798 g/mL.

7. You find a solution on the shelf that is labeled 30%
NH_{3} (aq). The density of the solution is 0.982 g/mL.
Calculate the following:

a) mole fraction of ammonia = ____________

b) molality of ammonia = ____________

c) molarity of ammonia = ____________

8. Adrenaline is the hormone that triggers release of extra
glucose molecules in times of stress or emergency. A solution of
0.64 g of adrenaline in 36.0 g of CCl_{4} causes an
elevation of 0.49˚C in the boiling point. Given that the
k_{b} for CCl_{4} is 5.02 C/m, what is the
molecular mass of adrenaline.

9. The Henry's Law constant for the solubility of
nitrogen in water is 6.40x10^{-4} M/atm at 25.0 Celsius. At
570 torr, how many grams of N_{2} can be dissolved in 250 L
of water at 25.0 degrees Celsius

10. What is the osmotic pressure of a 1.36 M
aqueous solution of urea [(NH_{2})_{2}CO)] at
22.0˚C ?

Answer #1

5) The freezing point will be depressed most by the solution
that contains the most

solute particles.

Classify each solute as a strong electrolyte, a weak
electrolyte, or a

nonelectrolyte.

Here, three solutions have the same concentration (0.50m), so comparing the solutions is straight forward.

HCl is a strong electrolyte, so under ideal conditions it
will

completely dissociate into two particles per molecule.

HCl. ------> H+ + Cl-

Acetic acid is a weak electrolyte, so it will only dissociate to a small extent.

CH3COOH <-----> CH3COO- + H+

Glucose is a nonelectrolyte, so glucose molecules remain as glucose molecules in solution.

for these solutions, the order in which the

freezing points become lower is:

0.50 m glucose > 0.50 m acetic acid > 0.50 m HCl

The HCl solution will have the lowest freezing point

A. You wish to prepare 198 grams of 10.3 %
Na3PO4. How many grams will need of sodium
phosphate and how many mL of water? Assume that the density of
water is 1.00 g / ml.
B. If 20.5 grams of an aqueous solution of cobalt(II) sulfate,
CoSO4, contains 2.84 grams of cobalt(II) sulfate, what
is the percentage by mass of cobalt(II) sulfate in the
solution?
C. An aqueous solution of lead nitrate,
Pb(NO3)2, contains 8.74 grams of lead nitrate...

Please answer only if you 100% know and it has to be all of
them! Please show work neatly!!! :)Thanks!
1. Calculate the molarity, molality and mass % of NH3 in a
solution in which 60.0g of NH3 are dissolved in 140.0g of water.
The Density of this solution is 0.982g/mL
2. A solution is prepared by dissolving 38.0g of non-volatile
molecular solute in 125 grams of benzene. The boiling point of this
solution is 84.5C (Celsius) and the boiling...

Complete each of the following calculations, showing all work.
You must complete the calculations in the order they appear to
solve all of the problems. This Web Lab has to be completed and
turned in by November 25th. PLEASE SHOW ALL WORK.
A bottle of vintage port wine has a volume of 750 ml and
contains 18% ethanol (C2H6O) by volume.
Ethanol has a density of 0.789 g/ml. At 20 OC port wine
has a density of 0.990 g/ml. The...

PLEASE SHOW ALL WORK WHERE RELEVANT
18. A solution is prepared by dissolving 12.36 g of CaCl2 (an
electrolyte, molar mass = 111 g) in 135g of H2O (molar mass
= 18.0 g). The resulting solution has a density of 1.10 g/mL.
Calculate the molarity of CaCl2 in the solution.
22. The greater the __________ , the better the substance is at
forming a solution that can conduct an electrical current.
A. molecular mass
B. dielectric constant
C. degree of...

PLEASE SHOW ALL WORK!
1) 65 g of ice at -17°C is mixed with 256 g of water at 29.2°C.
Calculate the final temperature of the mixture. Assume that no
energy in the form of heat is transferred to the environment. (Heat
of fusion = 333 J/g; specific heat capacities: ice = 2.06 J/g x K,
liquid water = 4.184 J/g x K)
2) In the reaction of barium chloride with potassium
phosphate, barium phosphate and potassium chloride are produced....

Please answer all, thank you!
Part A
How many grams of hydrogen are collected in a reaction where
1.90 L of hydrogen gas is collected over water at a temperature of
40 ∘C and a total pressure of 750 torr?
mH2=_____g
Part B
Describe how you would make 100.0 mL of a 0.900 M NaOH solution
from a 13.0 M stock NaOH solution.
Dilute Value/Units
of the 13.0 M stock solution to a final volume of 100.0 mL.
Part C...

Be sure to show all of your work and when performing
calculations, report answers to the correct number of significant
figures. There should be four questions on this pre-lab assignment.
The specific heat of water is 4.184 J/(g oC).
Question:1
Using Hess's Law, show how the three reactions in the BACKGROUND
section of the lab can be combined to obtain the standard molar
enthalpy of formation of MgO(s),
Mg(s) + ½ O2(g) → MgO(s).
You won't have actual numbers to...

Please answer parts A-K. Thank you!
Part A
How many mm^3 are in 2.20 ft^3
Part B
A lead ball has a mass of 25 pounds and a density of 11.4
g/cm^3. What is the volume of the ball in ml?
Part C
How many low dose 81 mg aspirin tablets can be made from 25.0
pounds of aspirin?
Part D
How much heat in kJ is needed to raise the temperature of 60.0
gal of water from 25.0°C to...

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