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Marrrta [24]
2 years ago
11

How many molecules of sulfur trioxide would react with 68.9 L of water at STP to produce sulfuric acid? SO3 + H2O H2(SO4)

Chemistry
1 answer:
AnnyKZ [126]2 years ago
7 0

Answer:

1.9×10²⁴ molecules

Explanation:

Equation of reaction:

SO₃ + H₂O → H₂SO₄

Since the gas is at STP, then we can use ideal gas equation,

PV = nRT

P = pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = ideal gas constant

T = temperature of the ideal gas

P = 1.0atm

V = 68.9L

n = ?

R = 0.082J/mol.K

T = 273.15K

n = PV / RT

n = (1.0 × 68.9) / (0.082 × 273.15)

n = 68.9 / 22.3983

n = 3.076 moles = 3.1 moles

From the equation of reaction,

1 moles of SO₃ will react with 1 mole of H₂O,

Therefore

3.1 moles of SO₃ will react with 3.1 moles of H₂O

Number of moles of SO₃ = 3.1 moles

1 moles = 6.023×10²³ molecules(Avogadro's constant)

3.1 moles = x molecules

X = 3.1 × 6.023×10²³

X = 1.867×10²⁴ molecules

The number of molecules of SO₃ is approximately 1.9×10²⁴ molecules

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Answer is: intramolecular attractions are stronger.

Intramolecular attractions are the forces between atoms in molecule.

There are several types of intramolecular forces: covalent bonds, ionic bonds.

Intermolecular forces are the forces between molecules. The stronger are intermolecular forces, the higher is boiling point of compound, because more energy is needed to break interaction between molecules.

There are several types of intermolecular forces: hydrogen bonding, ion-induced dipole forces, ion-dipole forces andvan der Waals forces.

Hydrogen bonds are approximately 5% of the bond strength of covalent C-C or C-H bonds.

Hydrogen bonds strength in water is approximately 20 kJ/mol, strenght of carbon-carbon bond is approximately 350 kJ/mol and strengh of carbon-hydrogen bond is approximately 340 kJ/mol.

20 kJ/350 kJ = 0.057 = 5.7 %.


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