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3 years ago

Why Group 18 elements on the periodic table rarely form compounds

1 answer:

4 0

Most elements on group 18 are the Noble Gases. They already have a complete last level with 8 electrones. Actually they can form compounds but only on the lab and they will not even last half a second.

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An Argon atom will do which of the following when it forms an ion? Choose all that apply and are correct.

sattari [20]

Answer:

Explanation:

Noble gases are already stable

And since Argon is a noble gas it is stable

5 0

3 years ago

What is the molarity of a solution in which 102 grams of aluminum oxide, Al2O3, is

irga5000 [103]

Answer:

2.00 M

Explanation:

The formula mass of aluminum oxide is 2(27)+3(16)=102 g/mol.

So, there is 1 mole of solute in 500 mL=0.5 L of solution

Now, we can use the equation molarity = (moles of solute)/(liters of solution)

molarity = 1/0.5 = 2.00 M

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2 years ago

Balance the equation and show the calculation of the number of moles and grams of CO2 formed from 11.9 grams of O2. Show your an

n200080 [17]

Answer:

0.2349 moles, 10.3356 g

Explanation:

The given reaction is :

$C_6H_{14}+O_2\rightarrow CO_2 + H_2O$

The balanced reaction by equating the same number of each atom both side is :

$2C_6H_{14}+19O_2\rightarrow 12CO_2 + 14H_2O$

Given that :

Amount of oxygen gas = 11.9 g

Molar mass of oxygen gas = 32 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus, moles are:

$moles= \frac{11.9\ g}{32\ g/mol}$

$moles= 0.3719\ mol$

From the reaction,

19 moles of oxygen gas on reaction forms 12 moles of carbon dioxide

Also,

1 mole of oxygen gas on reaction forms 12/19 moles of carbon dioxide

So,

0.3719 moles of zinc on reaction forms $\frac {12}{19}\times 0.3719$ mole of carbon dioxide

Moles of carbon dioxide formed = 0.2349 moles

Mass of carbon dioxide = moles×Molar mass

Molar mass of carbon dioxide = 44 g/mol

Mass of carbon dioxide formed = 0.2349 ×44 g = 10.3356 g

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3 years ago

What are the four fundamental types of organic molecules

9966 [12]

Nucleic acids, proteins, carbohydrates, and lipids

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4 years ago

What is a chemical change?

Mamont248 [21]

Answer:

Explanation:

5 0

4 years ago

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