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abruzzese [7]
3 years ago
5

80 points!! Need help asap!!

Chemistry
2 answers:
Bess [88]3 years ago
6 0

Answer:

i feel like a is right i dont know but i would just guess

Explanation:

kherson [118]3 years ago
4 0

Answer:

Search up bond enthalpy and enpalthy of reaction it should be pretty easy once you get to understand it. It is way to hard for me to explain.

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What events caused the formation of most islands in the South Pacific?
Svetach [21]
The answer is D. Because most islands have dormant volcanoes
4 0
3 years ago
How many Hydrogen atoms are there in 5 g of NH3? (molar mass of NH3 = 17<br>g/mol)​
goldfiish [28.3K]

Answer:5.309 × 10²⁴ atoms.

Explanation:

Given that

molar mass of NH3 = 17 g/mol

Mass of NH3 = 5g

Therefore, No of moles of NH3 = Mass/ molar mass

=  5g/ 17g/mol

= 0.294 moles.

I  mole = 6.02 × 10²³ atoms

Therefore  the number of hydrogen atoms in a 0.294 moles of ammonia  gives us

0.294× 6.02 × 10²³ × 3  ( since there are 3 hydrogens in Ammonia )

= 5.309 × 10²⁴ atoms.

5 0
3 years ago
What type of compound is created when potassium and chlorine combine explain how they combine and write the chemical formula. Ne
Elodia [21]

Answer : Ionic compound is created when potassium and chlorine combine. The chemical formula of the compound is KCl.

Explanation :

When potassium and chlorine combine then the type of compound created is Ionic compound.

Ionic compound : These are those compounds which are made of a metal element and non-metal element. Salts are ionic compound which consists of a positive and negative ions.

The electronic configuration of Potassium is,

1s^22s^22p^63s^23p^64s^1

The electronic configuration of Chlorine is,

1s^22s^22p^63s^23p^5

From this we conclude that the potassium atom is a metal which has 1 electron in their valence shell and chlorine atom is a non-metal which has 7 electrons in their valence shell. For the complete octet, chlorine atom needs only 1 electron which it receives from the potassium atom.

During this process, potassium atom will loses 1 electron and acquire positive charge and chlorine atom will gain 1 electron from potassium atom and acquire negative charge.

K^++Cl^-\rightarrow KCl

The chemical formula of the compound is KCl.

5 0
3 years ago
Who introduces the concept of atomic number?
aleksley [76]
Henry Moseley developed the concept of atomic numbers.
4 0
3 years ago
If 19.7 g of AlI3 is actually produced, what is the percentage yield? <br> 2 Al + 3 I2 → 2 AlI3
tatuchka [14]
<span>The formula actual yield / theoretical yield is used to calculate the percent yield of a reaction. This value is a measure of how much product is produced relative to the what is supposed to be produced. It seems that the given in the problem is incomplete so we cannot really give a specific value. </span>
8 0
3 years ago
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