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3 years ago

Is LaCl3 an ternary ionic compound

Chemistry

1 answer:

Fantom [35]3 years ago

8 0

Answer:

yes

Explanation:

a ternary compound is a compound containing three different elements. An example is sodium phosphate, Na3PO4. The sodium ion has a charge of 1+ and the phosphate ion has a charge of 3-. Therefore, three sodium ions are needed to balance the charge of one phosphate ion.

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Malik formed a hypotheses that an increase in atmospheric oxygen levels by 10% would cause red-legged grasshoppers to grow large

sergejj [24]

Answer : Malik's experiment included to create artificial atmospheric oxygen; in order to perform experiment on red-legged grasshopper for growing it larger than normal, the part of recreating or mimicking the artificial oxygen for the experiment with additional 10% increase seems to be bit difficult and this may create a problem in defining the accuracy and precision for the experiment.

8 0

3 years ago

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UNA ALEACIÓN DE DOS METALES A Y B TIENE UNA DENSIDAD RELATIVA DE 5 LAS DENSIDADES RELATIVAS DE A Y B RESPECTIVAMENTE SON 4 Y 10

nadezda [96]

Answer:

Explanation:

English please?

5 0

3 years ago

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How many atoms are there in 8.88 g Si?

Mariana [72]

Answer:

$\boxed {\boxed {\sf 1.90 \times 10^{23} \ atoms \ Si}}$

Explanation:

We are asked to find how many atoms are in 8.88 grams of silicon.

<h3>1. Grams to Moles </h3>

First, we convert grams to moles. We use the molar mass or the mass of 1 mole of a substance. These values are found on the Periodic Table as they are equal to the atomic masses, but the units are grams per mole instead of atomic mass units.

Look up silicon's molar mass.

Si: 28.085 g/mol

We will convert using dimensional analysis. Set up a conversion factor with the molar mass.

$\frac { 28.085 \ g \ Si}{1 \ mol \ Si}$

We are converting 8.88 grams of silicon to moles, so we multiply by this value.

$8.88 \ g \ Si *\frac { 28.085 \ g \ Si}{1 \ mol \ Si}$

Flip the fraction so the units of grams of silicon cancel.

$8.88 \ g \ Si *\frac{1 \ mol \ Si} { 28.085 \ g \ Si}$

$8.88 *\frac{1 \ mol \ Si} { 28.085 }$

$\frac {8.88} { 28.085 } \ mol \ Si$

$0.316183015845 \ mol \ Si$

<h3>2. Moles to Atoms </h3>

Next, we convert moles to atoms. We use Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of silicon.

Set up another conversion factor.

$\frac {6.022 \times 10^{23} \ atoms \ Si}{1 \ mol \ Si}$

Multiply by the number of moles we calculated.

$0.316183015845\ mol \ Si *\frac {6.022 \times 10^{23} \ atoms \ Si}{1 \ mol \ Si}$

The units of moles of silicon cancel.

$0.316183015845 * \frac {6.022 \times 10^{23} \ atoms \ Si}{1}$

$0.316183015845 * {{6.022 \times 10^{23} \ atoms \ Si}$

$1.90405412 \times 10^{23} \ atoms \ Si$

<h3>3. Significant Figures</h3>

The original measurement of 8.88 grams has 3 significant figures, so our answer must have the same.

For the number we calculated, that is the hundredth place. The 4 in the thousandth place tells us to leave the 0 in the hundredth place.

$1.90 \times 10^{23} \ atoms \ Si$

<u>8.88 grams of silicon contains 1.90 ×10²³ atoms of silicon.</u>

6 0

3 years ago

What kind of acid is chlorous acid?<br><br>A Monoprotic acid<br>B Diprotic acid<br>C Triprotic acid

tangare [24]

Answer:

It might be B

Explanation:

because its HClO2

7 0

4 years ago

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Which of these four atoms is the MOST chemically stable given the electron formation of each?

Allushta [10]

The most chemically stable of the four atoms given the <em>electron configuration</em> of each is; Choice A : He.

Helium (He) is a chemical element with the atomic number 2 on the periodic table. It's electron formation is 1s². It has zero valence electron in it's atomic shell.

Lithium (Li) is a chemical element with the atomic number 3 on the periodic table. It's electron formation is 1s² 2s¹. It has 1 valence electron in it's atomic shell.

Nitrogen (N) is a chemical element with the atomic number is 7 on the periodic table. It's electron formation is 1s² 2s² 2p³. It has 3 valence electron in it's atomic shell.

Sulphur (S) is a chemical element with the atomic number is 16 on the periodic table. It's electron formation is 1s² 2s² 2p⁶ 3s² 3p4. It has 4 valence electron in it's atomic shell.

Chemical stability is measured by the number of valence electron present in a chemical element atomic shell. Therefore Helium (He) has zero (0) valence electron in it's atomic shell making it the most stable amongst the chemical element listed above because elements with zero valence electron are unreactive and are the most stable elements on the periodic table.

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3 0

2 years ago