The image shows a portion of the periodic table. Which two elements have similar characteristics?
2 answers:
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Answer : The final pressure in the system is 4.22 atm.
Explanation :
First we have to calculate the moles of methane.
where,
P = pressure of gas = 9.61 atm
V = volume of gas = 3.06 L
T = temperature of gas = T
= number of moles of methane gas = ?
R = gas constant
Now put all the given values in the ideal gas equation, we get:
Now we have to calculate the moles of oxygen gas.
where,
P = pressure of gas = 1.75 atm
V = volume of gas = 6.65 L
T = temperature of gas = T
= number of moles of oxygen gas = ?
R = gas constant
Now put all the given values in the ideal gas equation, we get:
Now we have to determine the final pressure in the system after mixing the gases.
where,
= final pressure of gas = ?
= final volume of gas = (3.06 + 6.65)L = 9.71 L
T = temperature of gas = T
R = gas constant
Now put all the given values in the ideal gas equation, we get:
Therefore, the final pressure in the system is 4.22 atm.
Answer:
7.89 g
Explanation:
Step 1: Write the balanced equation
S₈ + 16 F₂(g) → 8 SF₄
Step 2: Calculate the moles corresponding to 2.34 g of S₈
The molar mass of S₈ is 256.52 g/mol.
Step 3: Calculate the moles of SF₄ produced from 9.12 × 10⁻³ mol of S₈
The molar ratio of S₈ to SF₄ is 1:8. The moles of SF₄ produced are 8/1 × 9.12 × 10⁻³ mol = 0.0730 mol
Step 4: Calculate the mass corresponding to 0.0730 moles of SF₄
The molar mass of SF₄ is 108.07 g/mol.