An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. how many protons does boron have?
2 answers:
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The image of the bonds are missing, so i have attached it.
Answer:
A) - Sigma bond
-Sp³ and Sp³
- None
B) - Sigma and pi bond
- Sp² of C and p of O
- p of C and P of O
Explanation:
A) For compound 1;
- the molecular orbital type is sigma bond due to the end-to-end overlapping.
- Atomic orbitals in the sigma bond will be Sp³ and Sp³
- Atomic orbitals in the pi bond would be nil because there is no pi bond.
B) For compound 2;
- the molecular orbital type is sigma and pi bond
-Atomic orbitals in the sigma bond would be Sp² of C and p of O
- The Atomic orbitals in the pi bond will be; p of C and p of O
Answer:
19.47%
Explanation:
<em>The percentage by mass of </em><em> would be </em><em>19.47%</em><em>.</em>
The percentage by mass of a substance in solution is calculated as:
Given that the mole fraction of = 0.432
The total number of mole fraction of a solution = 1
Hence, mole fraction of water = 1 - 0.432 = 0.568
Mass of water = molar mass x mole
= 98.079 x 0.432 = 42.37 g
Mass of = molar mass x mole
= 18.02 x 0.568 = 10.24 g
Hence,
<em>%mass of</em> =
= 19.47%