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2 years ago

Correct each of the following statements:

Chemistry

1 answer:

IceJOKER [234]2 years ago

7 0

Elements can be classified as metals, metalloids or nonmetals is a correct statements.

<h3>Clarification of that statement : </h3>

Metals are ductile and malleable by nature, and they are excellent conductors of heat and electricity. At room temperature, the majority of them are solids and have a distinctive silvery luster.

Nonmetals can be gaseous, liquid, or solid, but they typically do not transfer heat or electricity well and are not malleable or ductile.

The characteristics of metals and non-metals are intermediate in metalloids.

<h3>What is Metalloids?</h3>

The term is usually applied to a group of six to nine elements (boron, silicon, germanium, arsenic, antimony, tellurium, and possibly bismuth, polonium, astatine) near the middle of the P block or main block of the periodic table.

Metals are typically hard, bright, fusible, malleable, and ductile elements with excellent electrical and thermal conductivity.
Non-metals are elements that do not have metallic properties. Metalloids are elements with properties intermediate between those of metals and nonmetals.
In some cases, these elements are referred to as semimetals.
Examples of metalloids include boron, silicon, tellurium, germanium, arsenic, antimony. Others include aluminum, astatine, polonium, etc.

To know more about Metalloids please click here : brainly.com/question/6007181

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Dilute hydrochloric acid was titrated with sodium carbonate solution. • 10.0 cm3 of 0.100 mol / dm3 hydrochloric acid were place

mrs_skeptik [129]

Solution :

It is given that dilute hydrochloric acid is titrated with sodium carbonate solution.

$10 \ cm^3$ of a 0.100 $mol/dm^3$ of hydrocholric acid is used.

Thus, 10 mL of the 0.1 molar dilute hydrochloric acid is titrated with 16.2 mL of Sodium carbonate solution.

The equation would be :

$Na_2CO_3 (aq) + 2HCl(aq) \rightarrow 2NaCl(aq) + CO_2(g) +H_2O (l)$

Now we know that that the

Molarity = $\frac{n}{v} \times 100$

For hydrochloric acid solution,

$0.1=\frac{n}{10} \times 100$

∴ n = 0.01 moles.

Now for one mole of $Na_2CO_3$ , two moles of HCl acid is used.

For one mole of HCl, one-half mole of $Na_2CO_3$ is required.

Therefore, for 0.01 mole of HCl, we require 0.005 mole of $Na_2CO_3$ .

Hence, 0.01 mole of hydrochloric acid and 0.005 mole of $Na_2CO_3$ solution is used.

The color turns red when methyl orange indicator is used in HCl acid.

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3 years ago

Can someone help me with this! I need it ASAP! I don’t understand

Archy [21]

Answer:

The answer to your question is:

Explanation:

1) Increasing atomic radius:

Oxygen 74

Aluminum 143

Potasium 227

2) Increasing electronegativity

Neon -

Aluminum 1.61

Sulfur 2.58

Oxygen 3.44

3.-

Electronegativity: is the measure of the tendency of an atom to attract a pair of electrons.

Ionization energy: is the quantity of energy that an isolated, gaseous atom must absorb to discharged an electron, resulting in a cation.

4.-

Atomic radius increases as we move down on the periodic table.

Atomic radius is the distance from the center of a nucleus to the outer most shell containing electrons.

5.-

Sulfur = 1s² 2s² 2p⁶ 3s² 3p⁴

Neon = 1s² 2s² 2p⁶

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