Answer:
The answer to your question is X = 0.072
Explanation:
Data
X I₂ = ?
mass of I₂ = 55.6 g
mass of hexane = 245 g
Formula
X I₂ = (moles of Iodine) / (moles of iodine + moles of hexane)
Process
1.- Convert the mass of reactants to moles
atomic mass of I₂ = 2 x 127 = 254g
atomic mass of hexane = (12 x 6) + (14 x 1) = 86 g
254 g ---------------- 1 mol
55.6 g------------- x
x = (55.6 x 1)/254
x = 0.22 moles of I₂
86 g ------------- 1 mol
245 g ------------- x
x = (245 x 1)/86
x = 2.84 moles
2.- Calculate the mole fraction of I₂
X = 0.22 / (0.22 + 2.84)
X = 0.22 / 3.07
X = 0.072
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Calculate: Punnett squares can be used to predict probable outcomes of genetic crosses. To calculate probability, divide the number of one kind of possible outcome by the total number of all possible outcomes. For example, if you toss a coin, the chance it will land on heads is equal to 1 ÷ 2.
Answer:
The order of increasing speed is: Cl₂ < CO₂ < Ar < N₂ < H₂.
Explanation:
- Thomas Graham found that, at a constant temperature and pressure the rates of effusion of various gases are inversely proportional to the square root of their masses.
<em>∨ ∝ 1/√M.</em>
where, ∨ is the rate of diffusion of the gas.
M is the molar mass of the gas.
Molar mass of N₂ = 28.0 g/mol.
Molar mass of H₂ = 2.0 g/mol.
Molar mass of Cl₂ = 70.9 g/mol.
Molar mass of CO₂ = 44.0 g/mol.
Molar mass of Ar = 39.94 g/mol.
∵ Molar mass of Cl₂ > Molar mass of CO₂ > Molar mass of Ar > Molar mass of N₂ > Molar mass of H₂.
<em>Remember that ∨ ∝ 1/√M.</em>
∴ The speed of H₂ > N₂ > Ar > CO₂ > Cl₂.
<em>So, the order of increasing speed is: Cl₂ < CO₂ < Ar < N₂ < H₂.</em>
Answer:
mass of CO2 = 20.9 g
Explanation:
Given that:
mass of O2= 30.4 g
molar mass O2 = 32
number of moles of O2 = 30.4 / 32
number of moles of O2 = 0.95 moles
The Volume of O2 = 2V
Using ideal gas equation:
PV = nRT
P × (2V) = 0.95 × R × T
PV = 0.475 RT ----- (1)
For CO2;
The volume = V
Using ideal gas equation:
PV = nRT ---- (2)
Equating equation (1) and (2) together, we get:
0.475 RT = nRT
Dividing both sides by RT
(0.475 RT)/RT = (nRT)/RT
0.475 = n
Thus, the number of moles of CO2 = 0.475
Since mass = number of moles × molar mass
mass of CO2 = 0.475 × 44
mass of CO2 = 20.9 g