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NNADVOKAT [17]
4 years ago
14

Why aerosol is called colloidal dispersion dosage form?

Chemistry
1 answer:
Gnom [1K]4 years ago
3 0

Answer:

hi I am new here...........

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A gaseous hydrogen is stored at 500 Bar and 25 oC in a composite storage with an internal volume of 220 liters. Determine the ma
Sonja [21]

The mass of the hydrogen gas in tank, given the data is 6.17 Kg

<h3>Data obtained from the question</h3>
  • Pressure (P) = 500 Bar = 500 × 0.986923 = 493.4615 atm
  • Temperature (T) = 25 °C = 25 + 273 = 298 K
  • Volume (V) = 220 L
  • Gas constant (R) = 0.0821 atm.L/Kmol
  • Compressibility factor (z) = 1.45
  • Molar mass of hydrogen gas = 2.016 g/mol
  • Mass of hydrogen gas (m) =?

<h3>How to determine the mass </h3>

PV = znRT

Divid both sides by zRT

n = PV / zRT

but

mole (n) = mass (m) / molar mass (M)

Thus,

m / M = PV / zRT

m = MPV / zRT

m = (2.016 × 493.4615 × 220) / (1.45 × 0.0821 × 298)

m = 6169 g

Divide by 1000 to express in Kg

m = 6169 / 1000

m = 6.17 Kg

Complete question

A gaseous hydrogen stored at 500 Bar and 25°C in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z = 1.45

3.06 kg

6.17 kg.

13.0 kg

5.05 kg

Learn more about ideal gas equation:

brainly.com/question/4147359

#SPJ11

8 0
2 years ago
How many moles are there in 5.7 x 10^25 molecules of Na2SO4? *
konstantin123 [22]

Explanation:

two moles sodium (45.98 g), one mole sulfur (32.06 g), and four moles oxygen (64.00 g) combine to form one mole of sodium sulfate (142.04 g).

8 0
3 years ago
You want to make 100 mL of a 2.5 M stock solution of calcium chloride (molecular weight 110.98 g/mol). How many grams of calcium
Evgesh-ka [11]

Answer:

27.7 g

Explanation:

  • 100 mL = 0.100 L

To solve this problem we use the definition of <em>molarity</em>:

  • M = mol / L

From the problem we're given M = 2.5 M and volume = 0.100 L. We use the above formula and <u>calculate the required moles of calcium chloride</u> (CaCl₂):

  • 2.5 M = moles / 0.100 L
  • moles = 0.25 moles CaCl₂

Finally we use the<em> molecular weight</em> of calcium chloride to <u>calculate the required mass</u>:

  • 0.25 moles CaCl₂ * 110.98 g/mol = 27.745 g CaCl₂

Rounding to the nearest tenth of a gram the answer is 27.7 g.

5 0
3 years ago
A solution is prepared by mixing 50.0 mL of ethanol with 300.0 mL of water. What is the volume percent of ethanol in this soluti
lora16 [44]

Answer:

The answer to your question is 14.3 %

Explanation:

Data

volume of ethanol = 50 ml

volume of water = 300 ml

volume percent = ?

Formula

Percent by volume = (volume of solute/volume of solution) x 100

Volume of solute = 50 ml

volume of solution = 300 + 50 = 350

Substitution

Percent by volume = (50/350) x 100

Simplification and result

<u>Percent by volume = 14.3 %</u>

3 0
3 years ago
Please help me and thank you
Alex17521 [72]

Answer:

The physical and chemical properties of the product do not match the properties of the reactant.

Explanation:

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) -------------------------------------> 2H 2O  (l)

The reaction between sugar and oxygen form a product which is different from the reactant that's why it indicate the occurrence of chemical reaction.

While in case of physical changes just state of matter are changed. Properties remain same.

6 0
3 years ago
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