The what and what properties of a substance affect how substances in a mixture seperate
1 answer:
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Answer: The last electron will be filled in first orbital of 3p sub-shell.
Explanation: Filling of electrons in orbitals is done by using Hund's Rule.
Hund's rule states that the electron will be singly occupied in the orbital of the sub-shell before any orbital is doubly occupied.
For filling up of the electrons in Sulfur atom having 16 electrons. First 10 electrons will completely fill according to Aufbau's Rule in 1s, 2s and 2p sub-shells and last 6 electrons are the valence electrons which will be filled in the order of 3s and then 3p.
3s sub-shell will be fully filled and the orbitals of 3p sub-shell will be first singly occupied and then pairing will take place. Hence, the last electron will be filled in the first orbital of 3p-sub-shell.
Answer:
51.65%
Explanation:
Magnesium carbonate pentahydrate is
1 mole of the compound contains 5 moles of water. The water can be extracted by heating the the compound and allowing the water to condense.
1 mole of the compound contains 5 moles of water molecule
mole = mass/molar mass
1 mole of the compound weighs: 1 x 174.3903 = 174.3903 g
5 moles of water weighs: 5 x 18.01528 = 90.0764 g
Percentage by mass of hydrate in magnesium carbonate pentahydrate
= 90.0764/174.3903 x 100%
= 51.65%