What is mass of universe ?

What is the order of mass of universe ?

Universe is

Expanse of universe is

What is a universal indicator ?

What is the value of universal gravitational constant?

(a). What is a universal indicator? For what purrpose is it used? (b). How does a universal indicator work? (c). Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to a test-tube containing water?

The universe is