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3 years ago

How many atoms are in 3.2 moles of chromium?

Chemistry

1 answer:

-BARSIC- [3]3 years ago

3 0

Hey there!

1 mole has 6.022 x 10²³ atoms.

Multiply that by 3.2 because we have 3.2 moles.

3.2 x 6.022 x 10²³

1.9 x 10²⁴

There are 1.9 x 10²⁴ atoms in 3.2 moles of chromium.

Hope this helps!

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Jobisdone [24]

Answer:

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Explanation:

Given that:

Half life = 44.5 days

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So,

$k=\frac {ln\ 2}{t_{1/2}}$

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The rate constant, k = 0.0156 days⁻¹

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration = 180 mg

Time = 267 days

So,

$[A_t]=180\ mg\times e^{-0.0156\times 267}$

$[A_t]=180\times e^{-0.0156\times 267}\ mg$

$[A_t]=2.79\ mg$

2.79 mg iron-59 is left in the sample after 267 days.

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Conceptually, the efficient level of carbon emissions is the level for which

yawa3891 [41]

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3 years ago

What is the 3 parts of the mole ratio step?

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