What does below chemistry rebus means?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

Can you place three balls such that the equation shown in the picture holds true?

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Why is a river so rich ?