The Ka of the acid is 1.3 * 10^ -7.
Ka is the constant of dissociation of the acid.
Kb is the constant of dissociation of the conjugated base
The relationship between Ka and Kb is:
Ka * Kb = Kw = 1 * 10 ^-`14
=> Kb = Kw / Ka
=> Kb = [1 * 10 ^ -14 ] / [1.3 * 10 ^ -7] = 7.69 * 10 ^-8 = 7.7 * 10 ^ -8
Answer: 7.7 * 10^-8
Answer:
B. chemical
Explanation:
Chemical change cannot go back to its original form
The heat required by the cube of iron has been 602.64 J.
The specific heat has been given as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.
The heat required has been expressed as:
<h3 /><h3>Computation for the heat required by Iron sample</h3>
The mass of the sample has been given as 55.8 g
The specific heat of tin has been,
The change in temperature, () has been:
Substituting the values for the heat required:
The heat required by the cube of iron has been 602.64 J.
Learn more about specific heat, here:
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Answer:
C + O2 ⇒ CO2
mole of O2: 18.6/32=0.58125= mole of CO2
⇒ gram of CO2: 0.58125*(12+32)=25.575
Explanation:
Answer:
Explanation:
We must use the Nernst equation
The equation for the cell reaction is is
2Cl⁻(0.384 mol·L⁻¹) + 2Co³⁺(0.324 mol·L⁻¹) ⇌ Cl₂(5.80 atm) + 2Co²⁺(0.158 mol/L)
Data:
E° = 0.483 V
R = 8.314 J·K⁻¹mol⁻¹
T = 25 °C
n = 2
F = 96 485 C/mol
Calculation:
T = 25 + 273.15 = 298.15 K