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AveGali [126]
3 years ago
13

Helium is considered a noble gas because it has a ________ valence electron shell save

Chemistry
1 answer:
castortr0y [4]3 years ago
8 0
Because it’s outermost ( actually , it’s only )
shell is full. The next shell holds 8 but it’s case it’s 2
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How many moles are in 89 liters of water vapor?
Brut [27]

Answer:

4 moles

Explanation:

A mole is equal to 6.02214076 × 1023 of any chemical unit (atoms, molecules, ions)

To find number of moles in 89 litres of water vapor use the following formula:

1 mole = 22.4 L

That is 1 L = \frac{1}{24} mole

Volume of water vapor = 89 litres

Therefore,

Number of moles in 89 litres = \frac{89}{24}=3.7 ≈ 4 moles

5 0
3 years ago
What is an example of conduction
kicyunya [14]

Hello There!

Conduction is the transfer of heat from one particle of matter to another.

“I Have 3 Examples Of Convection Provided Below”

“A Pot Sitting On A Hot Burner”

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5 0
4 years ago
100 POINTS+BRAINLIEST: How do you balance a chemical equation step by step? Please explain in simple language, give definitions
bogdanovich [222]

Answer:

list all the elements.

you need to find a number to multiply both sides to get the same result.

example: I said on the left side: 5×O2 which is 10. on the right side I do the same to get 10.

In order to do this I said: 4×H2O which is 8 H2,and 4 O.

I then said 3×CO2 which gives 3 C and 6 O2. 6+4=10.

Now Oxygen(O) is balanced. Do the same for the rest of the elements.

Explanation:

pls mark as brainliest thanks!

7 0
2 years ago
Read 2 more answers
A chemical reaction begins with 356kJ of energy and ends with 456kJ of energy.
Nookie1986 [14]

The enthalpy of the reaction is 100 kJ and the reaction is endothermic in nature.

<u>Explanation:</u>

Enthalpy of any chemical reaction is the measure of the difference in the energy utilized for performing a reaction. As in the present case, it is stated that the initially, a chemical reaction has 356 kJ of energy and after ending the chemical reaction has 456 kJ of energy.

This means the energy is increased after the chemical reaction. So the heat energy is absorbed during the reaction. This kind of chemical reaction where the products are formed by absorbing energy from the surrounding is termed as endothermic reaction.

Enthalpy = Energy absorbed = 456-356 =100 kJ.

So, the enthalpy of the reaction is 100 kJ. And as the enthalpy is positive which means the energy is absorbed from the surroundings, so the reaction is endothermic in nature.

6 0
3 years ago
Gas laws mad question under it​
ozzi

Answer:

what are you asking tho?

Explanation:

Thx for the Free points tho.

5 0
3 years ago
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