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3 years ago

Metals react with ______ to form compounds that are alkaline.

Chemistry

2 answers:

kondor19780726 [428]3 years ago

7 0

Metals react with ______ to form compounds that are alkaline.

A. metalloids

B. oxygen (O)

C. non-metals

D. hydrogen (H)

The answer is D, Hydrogen (H).

kap26 [50]3 years ago

3 0

Answer: Option (B) is the correct answer.

Explanation:

When metals react oxygen atom then they tend to form metal oxides which are basic in nature. This is because when metal oxides are added in water then it results in the formation of metal hydroxides which are alkaline in nature.

For example, $2Mg + O_{2} \rightarrow 2MgO$

Whereas when metals react with hydrogen atom then it results in the formation of metal hydrides which are acidic in nature.

When metals react with non-metals then it results in the formation of ionic compounds. These ionic compounds can be acidic or basic in nature.

Not all metals react with metalloids as only a few of them react with metalloids.

Thus, we can conclude that metals react with oxygen (O) to form compounds that are alkaline.

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deduce the formula of the compound that contains 2+ ions and 3- ions that both have the same electron configuration as argon

yanalaym [24]

$\\ \sf\longmapsto [Ar]$

2+ means

$\\ \sf\longmapsto [Ar]^{2-}$

The element will be Calcium

And

$\\ \sf\longmapsto [Ar]^{3+}$

The element will be Phosphorus

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3 years ago

When explaining about structural classifications to a group of students, the instructor discusses the peptides and proteins. The

stepladder [879]

Answer:

There are approximately 200 amino acids.

Explanation:

Proteins are usually larger than peptides. In addition, proteins contains amino acids which are about 50 and more than while the amino acids in peptides are just between 2 and 50. On the other hand, growth hormone which is also known as somatotropin is a type of peptide cell regeneration, growth, and reproduction. The number of amino acids in the growth hormones are approximately 200.

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3 years ago

Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil?

leonid [27]

It's an exciting and interesting process but those 5 points aren't worth a decent answer. The whole process is called fractioned distillation where different temperatures are reached, transforming the crude oil in gas. After being hit by a cold source it colds becoming different hydrocarbons depending on the temperatures.

6 0

3 years ago

A fuel cell designed to react grain alcohol with oxygen has the following net reaction:

sertanlavr [38]

Answer:

b. E = 2,28V

Explanation:

The maximum work is the same than ΔG. As ΔG could be written as:

ΔG = nFE (1)

Where n is moles of electrons transferred, F is faraday constant (96485 J/Vmol) and E is the voltage of the cell.

For the reaction:

CH₃OH(l) + ³/₂O₂(g) → CO₂(g) + 2H₂O(l)

The oxidation state of C in CH₃OH is -2 but in CO₂ is +4, that means transferred electrons are +4 - -2 = 6e⁻

Replacing in (1):

1320x10³ J = 6mol e⁻×96485J/Vmol×E

E = 2,28V

I hope it helps!

8 0

3 years ago

A chemist dissolves 484 .mg of pure perchloric acid in enough water to make up 240.mL of solution. Calculate the pH of the solut

sdas [7]

Answer:

1.70

Explanation:

The molar mass of perchloric acid is 100.46 g/mol. The moles corresponding to 484 mg (0.484 g) are:

0.484 g × (1 mol/100.46 g) = 4.82 × 10⁻³ mol

4.82 × 10⁻³ moles are dissolved in 240 mL (0.240 L) of solution. The molar concentration of perchloric acid is:

4.82 × 10⁻³ mol/0.240 L = 0.0201 M

Perchloric acid is a strong monoprotic acid, that is, it dissociates completely, so [H⁺] = 0.0201 M.

The pH is:

pH = -log [H⁺] = -log 0.0201 = 1.70

8 0

3 years ago