What does below chemistry rebus means?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

You need to arrange three 7 and mathematical symbols to form number 1?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What begins with T, ends with T, and has T in it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?