Can an acid-base indicator give you an exact value for the ph of a substance?

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.