Answer:
P = 28.5 atm
Explanation:
PV = nRT => P = nRT/V
P = Pressure = ?
n = moles of sample = mass/molar mass = 26g/44g·mol⁻¹ = 0.619 mole CO₂
R = gas constant = 0.08206 L·atm/mol·K
T = temperature in Kelvin = (35 + 273)K = 308K
V = volume in Liters = 550 ml = 0.550 L
Pressure (P) = nRT/V
= (0.619 mole)(0.08206 L·atm/mol·K)(308K)/(0.550 L) = 28.5 atm
The concentration of the chemist's working solution is 6.718 mol/L.
Given,
The volume of silver perchlorate solution (V₁) = 790 ml.
The volume of distilled water added to the silver perchlorate(V₂) = 290ml.
The concentration of a stock solution of silver perchlorate (C₂) = 18.3 mol/L.
We have to find the concentration of the chemist's working solution (C₁).
As we know,
V₁C₁ = V₂C₂
From the above formula, we get,
C₁ = V₂C₂/V₁
C₁ = 290 × 18.3/ 790
C₁ = 6.718 mol/L
The concentration of the working solution = 6.718 mol/L
Hence, the concentration of the chemist's working solution is 6.718 mol/L.
To learn more about the concentration or stock's solution, visit: brainly.com/question/14510306
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The ball will float as it’s density is less than the salt water.
Answer: A sea of electrons
Explanation:
Answer:
-5.51 kJ/mol
Explanation:
Step 1: Calculate the heat required to heat the water.
We use the following expression.
where,
- c: specific heat capacity
- m: mass
- ΔT: change in the temperature
The average density of water is 1 g/mL, so 75.0 mL ≅ 75.0 g.
Step 2: Calculate the heat released by the methane
According to the law of conservation of energy, the sum of the heat released by the combustion of methane (Qc) and the heat absorbed by the water (Qw) is zero
Qc + Qw = 0
Qc = -Qw = -22.0 kJ
Step 3: Calculate the molar heat of combustion of methane.
The molar mass of methane is 16.04 g/mol. We use this data to find the molar heat of combustion of methane, considering that 22.0 kJ are released by the combustion of 64.00 g of methane.
