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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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In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy level

timofeeve [1]

Answer:

8 electrons

Explanation:

As per the octet rule, the atoms possess a tendency to bond in a manner that every atom must have at least eight(8) electrons in its outermost/valence shell. It can be done either by sharing, gaining, or losing electrons from one atom to another. According to this rule, flourine would have 8 electrons in its outer shell after two shared electrons are given to it.

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3 years ago

What is the pH of a solution made by mixing 200 mL of 0.025M HCl and 150 mL of 0.050 M HCl?

seraphim [82]

Answer:

The answer to your question is pH = 1.45

Explanation:

Data

pH = ?

Volume 1 = 200 ml

[HCl] 1 = 0.025 M

Volume 2 = 150 ml

[HCl] 2 = 0.050 M

Process

1.- Calculate the number of moles of each solution

Solution 1

Molarity = moles / volume

-Solve for moles

moles = 0.025 x 0.2

result

moles = 0.005

Solution 2

moles = 0.050 x 0.15

-result

moles = 0.0075

2.- Sum up the number of moles

Total moles = 0.005 + 0.0075

= 0.0125

3.- Sum up the volume

total volume = 200 + 150

350 ml or 0.35 l

4.- Calculate the final concentration

Molarity = 0.0125 / 0.35

= 0.0357

5.- Calculate the pH

pH = -log [H⁺]

-Substitution

pH = -log[0.0357]

-Result

pH = 1.45

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4 years ago

A blood sample is diluted by placing 0.2ml of the blood in a tube and filling the tube to the 5ml mark with a solution. what per

MariettaO [177]

V₀=0.2 ml
v=5 mL

a=100v₀/v

a=100×0.2/5=4%

4%

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3 years ago

How many moles of CuO are needed to react with 5.9 moles of CO2

Likurg_2 [28]

Answer:

If 5.9 moles of CO₂ react, 5.9 moles of CuO will also react.

Explanation:

The balanced reaction is:

CuO + CO₂ → CuCO₃

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

CuO: 1 mole
CO₂: 1 mole
CuCO₃: 1 mole

You can see that the stoichiometric relationship between CuO and CO₂ is 1: 1. In other words, for each mole of CuO that reacts, one mole of CO₂ will also react.

So if 5.9 moles of CO₂ react, 5.9 moles of CuO will also react.

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