What is the grams of molar mass of magnesium

Chemistry

2 answers:

castortr0y [4]3 years ago

5 0

4.0359398 x 10^- 23 g

Luden [163]3 years ago

4 0

Answer:

4.0359398 × 10^-23 g

Explanation:

All explanations or thoughts led to that answer

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What does Hund's rule state?

telo118 [61]

Answer:

Explanation:

Hund's Rule of Maximum Multiplicity states that electrons go into degenerate orbitals of sub-orbitals(p, d and f) singly before pairing commences.

Hund's rule is useful in determining the number of unpaired electrons in an atom. Hence, it explains some of the magnetic properties of elements.

An element whose atoms or molecules contain unpaired electrons is paramagnetic.

The element whose atoms or molecules contain orbitals that are all filed up with paired electron is diamagnetic.

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4 years ago

True or false: In a chemical reaction, atoms of elements cannot be present in the products if they were not present in the react

Amanda [17]

Answer:

Explanation: Your answer is A true

8 0

3 years ago

Which compound is likely to have an incomplete octet? which compound is likely to have an incomplete octet? so3 h2s ph3 no?

borishaifa [10]

Answer:- Octet of NO is incomplete.

Explanations:- For sulfur trioxide, there are total 24 valence electrons. S is the central atom. Two O atoms are bonded to S via single bonds and the third O is bonded to S via double bond. So, in this way, the octet of each O is complete. Total 8 electrons are used in bonding. Each of the single bonded O has three lone pairs and the double bonded O has two lone pairs. It means total 16 electrons are present in the form of lone pairs. The sum of electrons used in bonding and present as lone pairs is 16+8 = 24 and this is exactly same as total valence electrons. So, the octet of S is also complete.

hydrogen sulfide has total 8 valence electrons. H has only one valence electron and can form only a single bond. So, two H atoms are bonded to S via single bonds. Total 4 electrons are used in bonding and remaining 4 electrons are present as two lone pairs on S. So, the octet of S is also complete.

Phosphane has total 8 valence electrons. P is the central atom and the three H atoms are bonded to it via single bonds. Total 6 electrons are used in bonding and rest of the two electrons are present as one lone pair on P. The octet of P is also complete.

NO has 11 valence electrons. Either we make a single, double or triple bond between N and O, the octet for at least one of them is incomplete as there are add number of electrons. The best lewis structure of NO has a triple bond between N and O, 4 electrons around it and N has 3 electrons around it. The octet of O is complete but the octet of N is incomplete as it could complete only 7 electrons.

So, the right answer is NO.

Lewis structures for all the four molecules are given below: