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3 years ago

Which orbital is the first to fill with electrons in a given principal energy level?

Chemistry

2 answers:

olasank [31]3 years ago

8 0

<h2>Answer:</h2>

<u>The right option is</u><u> (B) S orbital</u>

<h2>Explanation:</h2>

Each orbital can hold two electrons. One spin-up and one spin-down. The first principal energy level contains only an s sublevel; therefore, it can hold a maximum of two electrons.

The order in which the orbitals are filled is given below

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 8s

Mkey [24]3 years ago

5 0

e) both s and p

hope this helps!

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How many moles of ethylene (C2H4) can react with 12.9 liters of oxygen gas at 1.2 atmospheres and 297 Kelvin?

Inga [223]

So in this equation, 3 oxygen will react with 1 ethylene.
then, you convert from 12.9 Liters to moles.
1 mole = 22.4 Liters of gas.
x moles = 12.9 liters

So, 22.4x = 12.9, which means that x = 12.9/22.4, and you get about 0.6, then you divide by 3 because you have 3 Oxygen, and you get about 0.2.

So, 0.2 moles of ethylene C2H4 can react with 12.9 liters of Oxygen Gas.

Hope this Helps :)

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3 years ago

HELP PLEASE I GIVE BRAINLIST heeelllpp

kotykmax [81]

Here we go, 4 attachments, you made me work LOL

8 0

3 years ago

Based on periodic properties, identify a molecule, X2, that is likely to react with Sr in a way similar to how Cl2 reacts with S

iris [78.8K]

Answer:

F2, Br2, I2

Explanation:

The halogen diatomic molecules have a general formula X2. Based on periodic properties, the halogens all have similar chemical behavior. This implies that, F2, Cl2, Br2 and I2 all have similar chemical properties.

All these other X2 halogen molecules are likely to react with St, just as Cl2 does.

5 0

3 years ago

Solution A has a mass of 70 g. Solution B has a mass of 35 g. When they are mixed, a chemical reaction occurs in which a gas is

Nuetrik [128]

Mass of gas produced : 15 g

<h3>Further explanation </h3>

In general, the reaction takes place in the open air. If the reaction results in the form of gas as in combustion, the mass of the reaction results will be smaller than the original mass.

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

So In a closed/isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.

Mass of reactants :

Mass of solution A = 70 g

Mass of solution B = 35 g

Mass of products :

Mass of mixture : 90 g

Mass of gas : X

Mass of gas X :

$\tt mass~reactants(mass~A+mass~B)-mass~products(mass~mixture+mass~gas)\\\\mass~gas=(70+35)-90\\\\mass~gas=15~g$

6 0

3 years ago

10.What is the mass number of silicon (Si) when it has 15 neutrons?Required to answer. Single line text.

fgiga [73]

Answer:

Explanation:

no of electrons=14

neutron no=15

14+15

3 0

3 years ago