What does below chemistry rebus means?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

Identify The phrase in the picture.

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

Using eight eights and addition only, can you make 1000?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

No matter how little or how much you use me, you change me every month. What am I?

How many triangles are there on the puzzle below?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?