Easy Riddles and Answers

Question: I can be seen, I can be not. Thanks to me, you'll fall in love. I mostly am sweet, but once I were sour. You can receive me, you can't just buy me. You only can send me, or simply share me. What Could I be?

Question: 8,549,176,320 What makes this number unique?

Question: The more you take, the more you leave behind.
What are they?

Question: Thirty men and only two women, but they hold the most power.
Dressed in black and white, they could fight for hours.

Who are they?

Question: What heavy seven letter word can you take two away from and be left with eight?