How many grams of HCl are required to produce 11.2 L of Cl2.The reaction occurs in the presence of excess HCl and at STP

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

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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1. a)c-14 has two more protons

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3. c) iron and nickel.