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3 years ago

Write a balanced equation for the following reaction;

Chemistry

1 answer:

Kazeer [188]3 years ago

3 0

Answer:

6K + N₂ —> 2K₃N

Explanation:

K + N₂ —> K₃N

The above equation can be balanced as illustrated below:

K + N₂ —> K₃N

There are 2 atoms of N on the left side and 1 atom on the right side. It can be balance by putting 2 in front of K₃N as shown below:

K + N₂ —> 2K₃N

There are 6 atoms of K on the right side and 1 atom on the left side. It can be balance by putting 6 in front of K as shown below:

6K + N₂ —> 2K₃N

Now the equation is balanced.

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___ molecules form ___ bonds between two or more nonmetal atoms by sharing electrons.

Evgesh-ka [11]

B, sharing electrons is a characteristic of covenant bonds.

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3 years ago

Melting point 134-137C you range 125-146C is sample pure?

nika2105 [10]

No because the deviation from the theoretical value is quite high and the temperature range of your sample is too wide.

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4 years ago

Determine the number of moles of carbon dioxide gas, water, and sodium chloride formed by the reaction of 42.0 grams of sodium b

brilliants [131]

Answer: .45 moles of CO2, H20,and NaCl

Explanation:

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4 years ago

A plutonium atom undergoes nuclear fission. Identify the missing element in the nuclear equation.

horrorfan [7]

Answer:

$_{92}^{226}U$

Explanation:

Let's firstly identify the atomic number (the number of protons) of Pu. This is done by referring to the periodic table and finding Pu. The atomic number of Pu is:

$Z=94$

In order to identify the type of a nuclear decay, we need to find the N/Z ratio. This is the ratio between the number of neutrons and the atomic number of an isotope. The number of neutrons is found by subtracting the number of protons from the mass number:

$N=M-Z$

That said, the N/Z ratio equation becomes:

$N/Z=\frac{M-Z}{Z}=\frac{M}{Z}-1=\frac{230}{94}-1=1.45$

This is a relatively high number thinking about the belt of stability of isotopes. Ideally, stable isotopes with a low Z value have an N/Z ratio of 1. Heavier isotopes with Z > 50 would have a slightly higher N/Z ratio and would be stable around N/Z = 1.25. This means we wish to decrease the N/Z ratio as much as possible.

Among all the decays, alpha-decay is preferred to decrease the N/Z ratio significantly (1.45 is much higher than 1.25). That said, we'll release an alpha particle with some nucleotide X of mass M and atomic number Z:

$_{94}^{230}Pu\rightarrow _Z^MX+_2^4\alpha$

According to the mass and charge conservation law:

$230=M+4\therefore M=230 - 4 = 226$

$94=Z+2\therefore Z = 94-2 = 92$

Identify an element with Z = 92 in the periodic table. This is uranium, U:

$_{92}^{226}U$

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3 years ago

Define the term ionization energy. Choose one:

olga nikolaevna [1]

Answer:

A. The amount of energy needed to remove 1 mole of electrons from 1 mole of ground-state atoms or ions in the gas phase.

Explanation:

Ionization energy is the quantity of energy required to remove an electron in ground electronic state from an isolated gaseous atom or ion, resulting in a cation. kJ/mol is the expresion we use for this energy, it refers to the amount of energy it takes for all the atoms in a mole to lose one electron each.

Ionization energy can be used as an indicator of reactivity and can be used to help predict the strength of chemical bonds because the more electrons are lost, the more positive the ion will be and the harder it will be to separate the electrons from the atom.

I hope you find this information useful and interesting! Good luck!

8 0

3 years ago