How is chemical energy useful? Give three examples.

One amu is equal to the mass of an electron the mass of one proton or one electron the mass of one neutron or one electron the mass of one neutron or one proton

Calculate the empirical formula from the given percent compositions. 82% nitrogen (N), 18% hydrogen (H)

Which is true regarding heme? which is true regarding heme? the binding of an oxygen molecule to the iron in a heme unit is completely reversible. each heme unit holds an iron ion in such a way that the iron can interact with a hydrogen molecule.

Wegener used that same dinosaur fossil have been found in different continents to support his theory of continental A. false B. true

Which of the following is a universal solvent? H2O H2O2 C2H5OH HCl

If you see the Sun is high in the sky, what can you say about the SUN as viewed from the opposite side of Earth at the same moment?

What element has 8 valence electrons

Which of the following best describes a metal? Brittle, shiny, and solid Brittle, dull, and low density Malleable, shiny, and able to conduct heat or electricity Malleable, dull, and solid, liquid, or gas at room temperature?

Which of the following errors could cause your percent yield to be falsely high, or even over 100%? Select ALL that apply. A.) Heating the sample too vigorously. B.) Handling the crucible directly with your hands. C.

If 56.8 ml of bacl2 solution is needed to precipitate all the sulfate ion in a 554 mg sample of na2so4 (forming baso4), what is the molarity of the solution?