3 years ago

Type the correct answer in each box. Spell all words correctly.

Chemistry

1 answer:

Dmitry_Shevchenko [17]3 years ago

8 0

There’s nothing there?

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2al2o3 4al 3o2 what is the mole ra#tio of aluminum to oxygen is 4:3

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In the reaction represented by the equation 2Al2O3-->4Al+3O2, what is the mole ratio of aluminum to oxygen?

4:3

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Answer:

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Carbon-14 has a half-life of 5,700 years.

Maksim231197 [3]

Answer:

$3.106\ \text{g}$

Explanation:

$t_{1/2}$ = Half-life of carbon = 5700 years

t = Time at which the remaining mass is to be found = 10400 years

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Decay constant is given by

$\lambda=\dfrac{\ln2}{t_{1/2}}$

Amount of mass remaining is given by

$m=m_0e^{-\lambda t}\\\Rightarrow m=m_0e^{-\dfrac{\ln2}{t_{1/2}} t}\\\Rightarrow m=11e^{-\dfrac{\ln 2}{5700}\times 10400}\\\Rightarrow m=3.106\ \text{g}$

The amount of the substance that remains after 10400 years is $3.106\ \text{g}$ .

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3 years ago

Ductile means...

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Explanation:

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2 years ago

What information is given by the superscripts in an electron configuration?

Paraphin [41]

<span>The superscripts in an electron configuration represents the number of electrons and protons in an element. </span>

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