Aluminum is a metallic element with 3 valence electrons. What is its oxidation number?

Chemistry

1 answer:

Veronika [31]3 years ago

3 0

Answer:

The neutral atoms of the element have an oxidation number of 0. When the atoms loose their three valence electrons to form ions they then have an oxidation number of +3

Explanation:

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For each of the following balanced chemical equations, calculate how many moles and how many grams of each product would be prod

anastassius [24]

Answer : The number of moles of $NH_4Cl$ and mass of $NH_4Cl$ is 0.50 mole and 27 grams respectively.

Solution : Given,

We are assuming that the reactant indicated in boldface is $NH_3$ . So,

Moles of $NH_3$ = 0.50 mole

Molar mass of $NH_4Cl$ = 53.5 g/mole

First we have to calculate the moles of $NH_4Cl$

The balanced chemical reaction is,

$NH_3(g)+HCl(g)\rightarrow NH_4Cl(s)$

From the reaction, we conclude that

As, 1 mole of $NH_3$ react to give 1 mole of $NH_4Cl$

So, 0.50 moles of $NH_3$ react to give 0.50 moles of $NH_4Cl$

The number of moles of $NH_4Cl$ is, 0.50 moles.

Now we have to calculate the mass of $NH_4Cl$

$\text{ Mass of }NH_4Cl=\text{ Moles of }NH_4Cl\times \text{ Molar mass of }NH_4Cl$

$\text{ Mass of }NH_4Cl=(0.50moles)\times (53.5g/mole)=26.75g\approx 27g$

The mass of $NH_4Cl$ is, 27 grams.

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What does it mean when a rock is foliares?

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One gallon of gasoline in an automobiles engine produces on average 9.50 kg of carbon dioxide, which is a greenhouse gas; that i

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Answer:

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