At STP 10 grams of CO can be dissolved in 3 L of water. Calculate the solubility of carbon monoxide at 200kPa.
Answers
P1/n1 = P2/n2
101.325 kPa/0.119 = 200 kPa/n2
n2 = 0.235 moles/L = 0.235mol x 28g/mol = 6.6g/L (assuming no change in temp)
Answer : The solubility of carbon monoxide gas at pressure 200 kPa is, 6.579 g/L
Explanation :
According top the Henry's Law, the solubility of a gas in a liquid is directly proportional to the pressure of the gas.
or,
where,
= initial solubility of gas =
= final solubility of gas = ?
= initial pressure of gas = 101.325 kPa (at STP)
= final pressure of gas = 200 kPa
Now put all the given values in the above formula, we get the final solubility of the gas.
Therefore, the solubility of carbon monoxide gas at pressure 200 kPa is, 6.579 g/L
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a gas that ignites a glowing splint is oxygen
Answers
The statement is true , oxygen is a gas which ignites a glowing splint.
How does oxygen ignite a glowing splint?
A splint is a simple piece which is used in scientific laboratories. They are typically long, thin strips of wood of about 6 inches long and 1/4 inches wide. They are consumable and inexpensive. They are used for lighting burners , chemical identification of various gases .
For gases which are hard to distinguish , a glowing splint test is used for identification of gases. . These tests are useful for identifying whether the gas is oxidizing,flammable or chemically inert.Oxygen is one of the gases which can be identified using the splinter test as it is combustible.
For the test, the splint is lit and is allowed to burn for a fraction of seconds and then blown out as the tip is still hot it is introduced into the jar containing the oxygen gas and thus re-igniting the splinter.
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how big the star is
b
how hot the star is
c
how dense the star is
d
how far away the star is
Answers
Magnitude is about how far away the star is, how big it is, and how bright it is.
Answers
The answer is electrolyte.
That is electrolyte is the type of minerals that is associated with maintaining water balance, osmotic equilibrium, acid-base balance and intracellular/extracellular differential.
Sodium, potassium and chlorides are the macrominerals that are known as the electrolytes, that are very important for the function says maintaining water balance, osmotic equilibrium, acid-base balance and intracellular/extracellular differential .
Answers
Explanation :
As we know that the geometrical symmetry of the molecule and the polarity of the bonds both are equally important for determining the polarity of the molecule.
The molecule that has zero dipole moment that means it is a geometrical symmetric molecule and the molecule that has some dipole moment that means it is a geometrical asymmetric molecule.
As the molecule is symmetric, the dipole moment will be zero and the molecule will be non-polar.
As the molecule is asymmetric, the dipole moment will not be zero and the molecule will be polar.
Thus, we can say that the a symmetry molecule is non-polar in nature and an asymmetry molecule is a polar molecule.
Answers
a. 0.712 M
b. 0.210 M
c. 0.336 M
Molarity is a measure of the concentration of solute in a solution.
It can be expressed as moles of solute ÷ volume of solution:
c = n ÷V
where:
c - concentration of solute,
n - moles of solute
V - volume of solution
n can be expressed as:
n = m ÷ Mr
where:
n - moles of solute
m - mass of solute
Mr - relative molecular mass
a. We know volume:
V = 289.2 mL = 0.2892 L
We need n and c.
n = m ÷ Mr
m = 15.4 g
Mr (KCl) = 74.55 g/mol
n = 15.4 g ÷ 74.55 g/mol
n = 0.206 mol
Thus,
c = 0.206 mol ÷ 0.2892 L
c = 0.712 mol/L = 0.712 M
b. We know volume:
V = 0.614 L
We need n and c.
n = m ÷ Mr
m = 14.4 g
Mr (CaCl₂) = 110.98 g/mol
n = 14.4 g ÷ 110.98 g/mol
n = 0.129 mol
Thus,
c = 0.129 mol ÷ 0.614 L
c = 0.210 mol/L = 0.210 M
c. We can use formula:
m₁V₁ = m₂V₂
m₁ = 3 M
V₁ = 28 mL= 0.028 L
m₂ = ?
V₂ = 0.250 L
Thus:
3 M × 0.028 L = m₂× 0.250 L
m₂ = 0.336 M
Answers
Solid is the low energy state of condensed matter is characterized by structural rigidity
Final answer:
The low-energy state of condensed matter characterized by structural rigidity and resistance to shape or volume changes is the solid state. This is due to its atomic structure, where molecules are organized in a rigid lattice, allowing the solid to maintain its shape and resist deformation.
Explanation:
The low-energy state of condensed matter that is characterized by structural rigidity and resistance to changes of shape or volume is defined as a solid. Going back to its atomic structure, atoms in a solid are in close contact and the forces between them allow the atoms to vibrate but not to change positions with neighbouring atoms. Basically, this atomic regulation in a solid form leads to its characteristic rigidity and resistance to shape or volume alterations.
Molecules in a solid, unlike in a liquid or gas, are organized into a lattice formation and retain this pattern despite external forces. This allows the solid state to resist deformation, maintain its shape, and have fairly constant volume. The ability of solids to resist compression is also due to their lattice structure, where atoms are at a relatively fixed distance apart, and under compression, the atoms would be forced into one another.
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