Answer:
Fe²⁺ = 80mol/Ls
H⁺ = 50mol/Ls
Mn²⁺ = 4.0x10²mol/Ls
Fe³⁺ = 80mol/Ls
H₂O = 1.0x10²mol/Ls
Explanation:
Based on the reaction:
MnO₄⁻ + 5 Fe²⁺ + 8H⁺ → Mn²⁺ + 5 Fe³⁺ + 4H₂O
<em>Where 1 mole of permangante with 5 moles of Fe²⁺ and 8 moles of H⁺ produce 1 mole Mn²⁺, 5 of Fe³⁺ and 4 of H₂O</em>
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If the diappearence of 1 mole has a rate of 4.0x10²mol/Ls, disappearence of 5 moles of Fe²⁺ and 8 moles of H⁺ have a rate of:
Fe²⁺ = 1 mole MnO₄⁻ × ( 4.0x10²mol/Ls / 5 moles of Fe²⁺) = 80mol/Ls
H⁺ = 1 mole MnO₄⁻ × ( 4.0x10²mol/Ls / 8 moles of H⁺) = 50mol/Ls
And rate of appearance of 1 mole Mn²⁺, 5 of Fe³⁺ and 4 of H₂O are:
Mn²⁺ = 1 mole MnO₄⁻ × ( 4.0x10²mol/Ls / 1 moles of Mn²⁺) = 4.0x10²mol/Ls
Fe³⁺ = 1 mole MnO₄⁻ × ( 4.0x10²mol/Ls / 5 moles of Fe³⁺) = 80mol/Ls
H₂O = 1 mole MnO₄⁻ × ( 4.0x10²mol/Ls / 4 moles of H₂O) = 1.0x10²mol/Ls
Answer:
Option (3)
Explanation:
Ductility of a substance is defined as the property by which a substance can be hammered and change its form into thin, stretched wires. In simple words, the ductile materials can be drawn into thin wires. Some of the examples of ductile substances are gold, copper and silver.
The rocks also have this property which means that they have the capacity to get deformed into enormous strains in the absence of large scale fracturing.
Thus, the correct answer is an option (3).
Number of breaths required to burn 2.5 kg mass of fat is 175000 breaths.
<h3>What mass mass of carbon dioxide is in one breath?</h3>
The mass of carbon dioxide in one breath is calculated as follows:
Volume of Carbon dioxide in one breath = 4% * 500
Volume of Carbon dioxide in one breath = 20 mL = 2 * 10⁻⁵ m³
Density of carbon dioxide = 2.0 kg/m³
Mass of carbon dioxide in one breath = 2 * 10⁻⁵ m³ * 2.0 kg/m³
Mass of carbon dioxide in one breath = 4 * 10⁻⁵ kg
Mass of carbon dioxide to be exhaled to burn 2.5 kg of fat = 2.8 kg * 2.5 = 7 kg of carbon dioxide.
Number of breaths required = 7 kg/4 * 10⁻⁵ kg
Number of breaths required = 175000 breaths
In conclusion, the mass of carbon dioxide in one breath determines the number of breaths required to burn 2.5 kg of fat.
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9.17 milliliters (mL) of the acid are needed to completely neutralize the base in this reaction.
<h3>What is a neutralization reaction</h3>
A neutralization reaction is a reaction between an acid and a base to produce a salt and water only.
The process of reacting given volume of acids or bases to determine the concentration or volume of either the acid or base required for neutralization is known as titration in volumetric analysis.
The formula to determine the volume of the acid required is given below:
where 
is the volume of acid required
Concentration of base, Cb = (3.51/74)/0.75 = 0.063 M
Vb = 50. 0 mL
Ca = 0.229 M
Na = 2
Nb = 3
Va = (0.063 * 50 * 2)/(0.229 * 3)
Va = 9.17 mL
In conclusion, the volume of the acid is determined from the concentration, volume and mole ratio of the reaction.
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Answer:
50.0 g.
Explanation:
- It is known that the decay of a radioactive isotope isotope obeys first order kinetics.
- Also, it is clear that in first order decay the half-life time is independent of the initial concentration.
- Half-life time is the time needed for the reactants to be in its half concentration.
- If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).
- So, the mentioned radioactive isotope after 10 years will have (100/2 = 50.0 g).
<em>Thus, the amount of radioactive isotope is 50.0 g.</em>
