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4 years ago

Given the incomplete equation 4Al + 3O2 → 2X, what compound is X?

Chemistry

2 answers:

Sever21 [200]4 years ago

8 0

<h3><u>Answer</u>;</h3>

B) Al2O3

<h3><u>Explanation;</u></h3>

Aluminium reacts with oxygen to form aluminium oxide.

The chemical reaction for the reaction between Aluminium and Oxygen is;

4Al+ 3O₂→ 2Al₂O₃

Therefore;

Compound X is Aluminium oxide (Al₂O₃)

kifflom [539]4 years ago

5 0

<u>Answer:</u> The correct answer is Option B.

<u>Explanation:</u>

When aluminium metal reacts with air, it produces an oxide named as aluminium oxide. The chemical formula for this compound is $Al_2O_3$

The balanced chemical equation for the above reaction follows:

$4Al(s)+3O_2(g)\rightarrow 2Al_2O_3(s)$

By Stoichiometry of the reaction:

4 moles of aluminium metal reacts with 3 moles of oxygen to produce 2 moles of aluminium oxide.

This reaction is a type of synthesis reaction because substances are reacting in their elemental state to produce one compound.

Hence, the correct answer is Option B.

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Answer:

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3 years ago

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3 years ago

Why does hydrogen have a -1 oxidation state in the compound NaH?

ruslelena [56]

your answer will be :

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3 years ago

For a lake in Michigan, researchers have determined that largemouth bass feed on smaller fish, which in turn feed on zooplankton

allsm [11]

Answer:

the expected decline in largemouth bass is 3,000 kg.

Option d) 3,000 kg is the correct answer.

Explanation:

Given the data in the question;

In 2016, there was 600,000 kg of zooplankton in the lake.

In 2017, an accidental runoff of insecticide near the lake caused a 50 percent decline of the zooplankton population in the lake.

Now,

The remaining mass of zooplankton after the 50% decline will be;

⇒ 600,000 kg zooplankton × 50%

⇒ 600,000 × 50/100

⇒ 300,000 kg of zooplankton

Now, with 10 percent trophic efficiency; smaller fish directly feed on zooplankton; decline in smaller fish mass will be;

⇒ 300,000 kg × 10%

⇒ 300,000 × 10/100

⇒ 30000 kg

Finally, with 10 percent trophic efficiency, largemouth bash directly feed on smaller fish, so the expected decline in mass of largemouth bash will be;

⇒ 30000 kg × 10%

⇒ 30000 kg × 10/100

⇒ 3,000 kg

Therefore, the expected decline in largemouth bass is 3,000 kg.

Option d) 3,000 kg is the correct answer.

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3 years ago

Why does hydrogen peroxide turn your skin white

Julli [10]

Answer:

Hydrogen Peroxide is known as a dental “debriding agent”. But when used on skin for minor wounds it will foam and turn surrounding tissue white. ... H2O2 decomposes easily to make water (H2O) and a single free oxygen atom which is looking for something to react with - like your skin.

Explanation:

4 0

3 years ago

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