1)
4 molecules of Hygdrogen is produced.
2)
4 atoma of Oxygen is produced.
3)
1 molecule of Fe3O4 is formed.
4)
1mole of 3 Fe : mole of 4 H2O
3 :4
=3/4
5) There are 2×4 = 8atoms of hydrogen on Reactant side.
Answer: Option (A) is the correct answer.
Explanation:
Atomic number of sodium is 11 and its electronic configuration is 
.
In order to gain stability, sodium loses one electron and hence it forms a positive ion 
.
Thus, we can conclude that when sodium combines with chlorine, it has a net charge of +1 because sodium loses a negative electron when forming chemical bonds.
The answer is Option B , Wash with soap and water.
That is when you are exposed to infectious materials by being accidentally stuck with a used needle , first thing that needs to be done is that wash with soap and water.
When someone used a needle, viruses in their blood, such as hepatitis B or HIV may contaminate it , so it is required to avoid these bacteria when you are exposed to infectious materials by being accidentally stuck with a used needle, wash with soap and water.
