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2 years ago

In which of the following compounds is the mass ratio of chromium to oxygen closest to 1.62 to 1.00?

Chemistry

1 answer:

ohaa [14]2 years ago

8 0

Answer:

The answer to your question is letter A

Explanation:

Data

Mass ratio 1.62 to 1.00

Atomic mass Cr = 52 g

Atomic mass O = 16

Process

1.- Calculate the proportion Chromium to Oxygen to each possible solutions

a) CrO₃ = $\frac{52}{16 x 3} = \frac{52}{48} = 1.08$

b) CrO₂ = $\frac{52}{16 x 2} = \frac{52}{32} = 1.63$

c) CrO = $\frac{52}{16} = 3.25$

d) Cr₂O = $\frac{52 x 2}{16} = \frac{104}{16} = 6.5$

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Explanation:

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3 years ago

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Answer:

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2 years ago

For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO]= 0.020M, and [CH3OH]= 0.030 M. Calcula

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The balanced equation for the reaction is

CO(g) + 2H₂(g) ⇄ CH₃OH(g)

The given concentrations are at equilibrium state. Hence we can use them directly in calculation with the expression for the equilibrium constant, k. expression for k can be written as

k = [CH₃OH(g)] / [CO(g)] [H₂(g) ]²

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From substitution,

k = 0.030 M / 0.020 M x (0.072 M)²

k = 289.35 M⁻²

Hence, equilibrium constant for the given reaction at 700 K is 289.35 M⁻².

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3 years ago