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dlinn [17]
3 years ago
12

A cube of metal has a mass of 5.05 x 10°g and its density is known to be 12.77 g/mL, what is the volume of this metal?

Chemistry
1 answer:
Usimov [2.4K]3 years ago
8 0

Answer:

Explanation:

option A is correct

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Answer:

t = 7.58 * 10¹⁹ seconds

Explanation:

First order rate constant is given as,

k =  (2.303 /t) log  [A₀] /[Aₙ]

where  [A₀]  is the initial concentraion of the reactant; [Aₙ] is the concentration of the reactant at time, <em>t</em>

[A₀]  = 615 calories;

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k = 2.00 * 10⁻²⁰ sec⁻¹

substituting the values in the equation of the rate constant;

2.00 * 10⁻²⁰ sec⁻¹ = (2.303/t) log (615/135)

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t = 2.303 / 3.037 * 10⁻²⁰

t = 7.58 * 10¹⁹ seconds

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