What does below chemistry rebus means?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

I have branches, but no fruit, trunk or leaves. What am I?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

I am sure no one can have two things for dinner. what are they?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What does the below image rebus riddle means ?