A solution of (NH4)2SO4 is to be prepared that is 2.25M in NH4+. What volume of solution can be produced using 50.0 g (NH4)2SO4? Show your work.

Convert .347 kilometers to miles show your work

What is the value of the standard enthalpy of formation of an element in its most stable form?

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium