Answer:
+6
Explanation:
We are given;
We are required to determine the oxidation number of S in the compound.
We need to know that;
- The total oxidation number of this compound is Zero
- Oxidation number of Ba metal is +2
- Oxidation number of Oxygen atom is -2
- There is 1 atom of Ba, 1 atom of S and 4 atoms of O in the compound.
Therefore; assuming oxidation number of S is x
Then, (1× 2) + (1 × x) + ( 4 ×(-2)) = 0
2 + x - 8 = 0
x = 6 or +6
Thus oxidation number of Sulfur in BaSO₄ is +6.
Heat can be transferred from one object to another in 3 different ways.
1) Conduction : This is the mode of transfer of heat through solid medium.
Example : A metal rod getting hot when hold over a flame.
2) Convection : This is the mode of transfer of heat through liquids
Example : Boiling of water.
3) Radiation : This type of heat transfer does not require any medium.
Example : When we stand close to a campfire, we feel warmer. Here the heat travels through air.
In the given problem, when a person gets into a car with hot black leather, his skin comes in contact with the hot object. Here the heat gets transferred through the skin which is a solid medium.
Therefore this is an example of conduction.
Answer:
Nicolaus Copernicus developed the Heliocentric model for the Solar System in the early 1500s. He was an astronomer, and he published a book in 1532 in which he proposed that the planets orbit the Sun rather than the Earth. The church reacted with outrage, and banned the book.
Answer:
Endergonic is in think en is close to in and exergonic is out
