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3 years ago

How many neutrons are in lithuim-8

Chemistry

1 answer:

irinina [24]3 years ago

4 0

Answer:

5 neutrons

Explanation:

There five isotopes of lithium. The most stable and abundant is lithium-7.

Its percentage is 92.5%. It has four neutrons. All lithium isotopes have same atomic number but different atomic mass because of different number of neutrons.

Lithium-8 have five neutrons.

Lithium-9 have six neutrons.

Lithium-11 have eight neutrons.

Lithium-4 has one neutron.

Lithium is alkali metal.

It is present in 1st group.

Its atomic number is 3.

Its atomic mass is 7 amu.

Lithium salts are used in psychiatric medicine.

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mixas84 [53]

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3 years ago

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2 years ago

2. What is an example of a molecule<br> with different types of atoms?

agasfer [191]

Answer:

a compound

Explanation:

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3 years ago

If a 67.3G rock is dissolved in 2.00L of acid, what is the molar concentration of gold in the acid solution

brilliants [131]

Answer:

[Au] = 0.171 M

Explanation:

For this question, we assume the rock is 100 % gold.

First of all, we determine the moles of gold

67.3 g . 1mol/ 196.97g = 0.342 moles

Molar concentration is defined as the moles of solute, contained in 1L of solution.

Our solution volume is 2L.

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Molar concentration, also called molarity of solution is the most typical unit of concentration.

6 0

2 years ago

Gaseous methane CH4 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is the t

Murrr4er [49]

Answer:

50.8 g

Explanation:

Equation of reaction.

$CH_4 + 2O_2 \to CO_2 + 2H_2O$

From the given information, the number of moles of methane = mass/ molar mass

= 15.4 g / 16.04 g/mol

= 0.960 mol

number of moles of oxygen gas = 90.3 g / 32 g/ mol

= 2.82 mol

Since 1 mol of methane requires 2 moles of oxygen

Then 0.960 mol of methane will require = 0.960 mol × 2 = 1.92 mol of oxygen gas

Thus, methane serves as a limiting reagent.

2.82 mol oxygen gas will result in 2.82 moles of water

So, the theoretical yield of water = moles × molar mass

= 2.82 mol × 18.01528 g/mol

= 50.8 g

8 0

3 years ago