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Tems11 [23]
3 years ago
15

What is the percent of Li in Li3N ? Please!!

Chemistry
2 answers:
lisabon 2012 [21]3 years ago
6 0
I think it maybe 59.7852%
rjkz [21]3 years ago
3 0

Answer: Li percentage in Li_3N is 59.8%.

Explanation: The question asks to calculate the mass percentage of Li in Li_3N .

The formula used for mass percentage of an element in a compound is:

mass percentage = (\frac{element mass}{compound mass})*100

Atomic mass of Li is 6.94 and atomic mass of N is 14.0.

There are three Li in the given compound. So, the mass of Li in the compound is = 3(6.94) = 20.82

Mass of compound = 20.82 + 14.0 = 34.82

Mass percentage of Li = (\frac{20.82}{34.82})*100  = 59.8%

Hence, the percentage of Li in Li_3N is 59.8%.

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What is the atomic number of the Adam shown 18 protons 22 neutrons
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It's 18 (the same as the number of protons:)
4 0
3 years ago
PLEASE HELP
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Answer:

B

Explanation:

All elements on both sides of the equation have the same amount of moles

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What happens when The vapour obtained by dropping conc. H2SO4 in a mixture of KI and MnO2 is treated with hypo solution​
Shalnov [3]

Iodine is decolorized.

The first reaction stated in the question occurs as follows;

2 KI (aq) + 2 H2SO4 (aq) + MnO2 (s) → MnSO4 (aq) + K2SO4 (aq) + I2 (s) + 2 H2O (l)

The reaction here is the formation of iodine from MnO2 and KI in the presence of dropwise H2SO4.

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2Na2S2O3 + I2→ Na2S4O6 + 2NaI

When this reaction takes place, iodine is decolorized due to its reduction to I^-.

6 0
2 years ago
A small portion of a crystal lattice is sketched below. What is the name of the unit cell of this lattice? Your answer must be a
Nikolay [14]

This is an incomplete question, the given sketch is shown below.

Answer : The name of given unit cell is, FCC (face-centered cubic unit cell)

Explanation :

Unit cell : It is defined as the smallest 3-dimensional portion of a complete space lattice which when repeated over the and again in different directions produces the complete space lattice.

There are three types of unit cell.

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  • BCC (body-centered cubic unit cell)
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In SCC, the atoms are arranged at the corners.

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The number of atoms of unit cell = Z = 1

In BCC, the atoms are arranged at the corners and the body center.

Z=\frac{1}{8}\times 8+1=2

The number of atoms of unit cell = Z = 2

The given unit cell is, FCC because the atoms are arranged at the corners and the center of the 6 faces.

Z=\frac{1}{8}\times 8+\frac{1}{2}\times 6=4

The number of atoms of unit cell = Z = 4

Thus, the name of given unit cell is, FCC (face-centered cubic unit cell)

7 0
3 years ago
Explain the steps for naming an oxy-acid (refernce pg. 252)
nata0808 [166]

Answer:

The first element is always named first, using entire element name.

Second element is named using its root and adding the suffix -ide.

Prefixes are used to indicate the number of atoms of each element that are present in the compound.

Explanation:

8 0
3 years ago
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