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Westkost [7]
1 year ago
9

Hi pls help pls pls. this is due at 11:59 help

Chemistry
1 answer:
Sveta_85 [38]1 year ago
7 0

Answer:

mass of salt 6.72g

Explanation:

mass of the combine mass with salt- mass of the empty beaker

36.176g−29.456g=6.72g

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What is the osmotic pressure of a solution of FeCl3(aq) in which 69.5 g of FeCl3(s) (molar mass = 162.20 g mol-1) are dissolved
ivolga24 [154]

The osmotic pressure of the solution is 25.48atm

Data;

  • Mass = 69.5g
  • Molar mass = 162.20g/mol
  • Volume = 2.35L
  • Temperature = 35.0^oC
<h3>Osmotic Pressure</h3>

The osmotic pressure of the solution is calculated as

\pi = iMRT

  • i = Vant Hoff Factor
  • M = molarity
  • R = gas constant
  • T = Temperature

The Vant hoff factor of the factor = 4

Let's calculate the molarity of the solution;

M = \frac{number of moles}{volume}

Number of moles = mass / molar mass

n = \frac{mass}{molar mass} \\

substitute the values into the formula and solve for it

n = \frac{69.5}{162.20} \\n = 0.428 moles

The molarity of the solution is calculated as

M = \frac{number of moles}{volume} \\M = \frac{0.428}{2.35} = 0.182 mol/L

The osmotic pressure of the solution is calculated as

\pi = iMRT\\\pi = 4 * 0.182 * 35\\\pi = 25.48 atm

The osmotic pressure of the solution is 25.48atm

Learn more on osmotic pressure here;

brainly.com/question/8195553

5 0
2 years ago
When coke burns in air then evolved gas is​
Arturiano [62]

Answer:

Explanation:

Carbon (coke) burns in air to form carbon dioxide gas.

(i) C(s) + O2 ↑= CO2 ↑

7 0
4 years ago
Which method is appropriate for separating a mixture of iron and aluminum? A. using a magnet B. distillation C. evaporation D. o
sladkih [1.3K]
Appropriate method for separating a mixture of iron and aluminum is definitely <span>A. using a magnet. If we use the second method we will </span>vaporize either aluminum or iron.
If we used the third method it <span> would  change liquid into a gas which is strange according to the task.
</span>And observing (even for a long time) won't help separating. 

7 0
3 years ago
How many moles of aqueous magnesium ions and chloride ions are formed when 0.250 mol of magnesium chloride dissolves in water
Mkey [24]

Answer:

0.250 mol Mg²⁺

0.500 mol Cl⁻

Explanation:

Magnesium chloride (MgCl₂) dissociates into ions according to the following equilibrium:

MgCl₂  ⇒  Mg²⁺ + 2 Cl⁻

1 mol      1 mol   2 mol

1 mol of Mg²⁺ and 2 moles of Cl⁻ are formed per mole of MgCl₂.  If we have 0.250 mol of MgCl₂, the following amounts of ions will be formed:

0.250 mol MgCl₂ x 1 mol Mg²⁺/mol MgCl₂= 0.250 mol Mg²⁺

0.250 mol MgCl₂ x 2 mol Cl⁻/mol MgCl₂= 0.500 mol Cl⁻

3 0
3 years ago
Under the same conditions of pressure and temperature, how are the particles of a solid different from the particles of a liquid
Tasya [4]
[a] the particles of a solid have stronger forces of attraction between them
4 0
4 years ago
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