Answer:
12*2*6.022*10^23. Atoms of hydrogen.
Explanation:
First of all if u know that 1 molecule of calcium hydroxide contain 2 hydrogen atom and 1 mole of calcium hydroxide contain 6.022*10^23 molecules of calcium hydroxide.
Hence 1 mole of calcium hydroxide contain 2*6.022*10^23 atom of hydrogen.
So 12 mole of calcium hydroxide contain =12*2*6.022*10^23. Atoms of hydrogen.
Answer:
Explanation:
Equation of reaction:
2HCl → H₂ + Cl₂
From the equation of reaction,
From ideal gas equation,
PV = nRT
P = pressure of the ideal gas
V = volume of the gas
n = number of moles
R = ideal gas constant
T = temperature of the gas
At STP,
P = 1.0atm
T = 273.15K
R = 0.082J/mol.K
PV = nRT
1 .0 × 11.2 = n × 0.082 × 273.15
11.2 = 22.398n
n = 11.2 / 22.398
n = 0.50mole
From the equation of reaction,
2 moles of HCl = 1 mole of Cl₂
X moles HCl = 0.5mole
X = (2 × 0.5) / 1
X = 1 mole of HCL
Number of mole = mass / molar mass
Molar mass of HCl = 1 + 35.5 = 36.5g/mol
Mass = number of mole × molar mass
Mass = 1 × 36.5
Mass = 36.5g
36.5g of HCl is required to to produce 11.2L of Cl₂
Answer:
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