3 years ago

When iron reacts with oxygen what substance is produced?

Chemistry

1 answer:

zhannawk [14.2K]3 years ago

8 0

It will produce iron oxide

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In the early 1960s, radioactive strontium-90 was released during atmospheric testing of nuclear weapons and got into the bones o

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Answer:

52.54 %

Explanation:

Half life = 29 years

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

Where, k is rate constant

So,

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

$k=\frac {ln\ 2}{29.0}\ {years}^{-1}$

The rate constant, k = 0.023902 hour⁻¹

From 1964 to 1991:

Time = 27 years

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

So,

$\frac {[A_t]}{[A_0]}=e^{-0.023902\times 27}$

$\frac {[A_t]}{[A_0]}=0.5245$

<u>The strontium-90 remains in the bone = 52.54 %</u>

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Copper has a density of 8.9 g cm3. if you have 90 g of copper how much volume is your occupying?

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In most cases, reactant-favored reactions have:

vekshin1

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Explanation:

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What Is the volume of 20g of benzene?

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