Which cell structure most resembles the human integumentary system? !

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?

To separate a mixture of hard candies nd marbles the most efficient method would be

When can a hypothesis be elevated to the status of a theory? a) when it is validated by an experiment b) when data gathered from an experiment precisely fits predictions c) when it can be proved to be true d) when it meets the test of repeated experimentation