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3 years ago

Which word equation best describes the following formula equation: 4Al + 302 + 2Al2O3?

Chemistry

2 answers:

liberstina [14]3 years ago

6 0

Answer:

Explanation:

The equation is not correctly written, so let's start with that.

4Al + 3O2 ====> 2Al2O3?

Totally correct, including the balance numbers, would be

4moles aluminum + 3 moles Oxygen ===> 2 moles of Aluminum Oxide

Anything else is incomplete.

o-na [289]3 years ago

5 0

Answer:

aluminum reacts with oxygen to produce aluminum oxide.

I hope this helps

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Which TWO are most likely to form a compound?<br> C<br> Mg<br> S<br> Ar

lbvjy [14]

Answer is Mr and S as MgS ..

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3 years ago

1.26 * 10^4 + 2.50 * 10^4 in sceintific notation

eduard

Hello! I can help you with this. First, convert them into it’s written out standard form. 10^4 is 10,000. 10,00 * 1.26 is 12,600. 10,000 * 2.5 is 25,000. 12,600 + 25,000 = 37,600 or 3.76 * 10^4 in scientific notation. The answer in scientific notation is 3.76 * 10^4.

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3 years ago

In the chemical reaction below, calcium (Ca) and water (H2O) react to form calcium hydroxide (Ca(OH)2) and hydrogen gas (H2). Ca

lakkis [162]

Answer:

Explanation:

The mass of the reactants should not change, in fact it would be equal because the only thing that changes is the form in which your products are in. The reactants will still have the same amount of mass from the products as no products were removed or added, the structure changed, the mass did not.

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3 years ago

Earth would fly off into space in a straight line if the ______________________________

ser-zykov [4K]

Answer: Gravity.

Explanation:

Earth and other objects would have fly off into space in a straight line if there would have been no gravity in between objects.

The gravity can be defined as the force between two objects in space which keeps two objects together in the space.

It is also responsible for holding the objects in space, making them move on their orbits, not allowing the heavenly bodies to crash.

So, there would be no gravity the objects will fall off in a straight line and none of the objects would be at its specified position.

3 0

4 years ago

4Fe (s) + 3 O2 (g) → 2 Fe2O3 (s)

Novay_Z [31]

Explanation:

The number acquired by an element after the lose or gain of an electron is called oxidation number.

For example, $4Fe(s) + 3O_{2}(g) \rightarrow 2Fe_{2}O_{3}(s)$

Here, oxidation number of Fe(s) is 0 and Fe in $Fe_{2}O_{3}$ is +3.

Oxidation number of O in $O_{2}(g)$ is 0 as it is present in its elemental state.

The oxidation number of O in $Fe_{2}O_{3}$ is calculated as follows.

$2(3) + 3x = 0\\6 + 3x = 0\\x = \frac{-6}{3}\\= -2$

Hence, oxidation number of O in $Fe_{2}O_{3}$ is -2.

The loss of electrons by an element or substance is called oxidation. Here, electrons are being lost by Fe(s) as an increase in oxidation state is occurring. So, Fe(s) is oxidized.

The gain of electrons by an element or substance is called reduction. Here, electrons are being added to $O_{2}$ as a decrease in its oxidation state is occurring. So, $O_{2}$ is reduced.

An element or compound which is being reduced is called oxidizing agent. Here, $O_{2}$ is the oxidizing agent.

An element or compound which is being oxidized is called reducing agent. Here, Fe(s) is the reducing agent.

5 0

3 years ago