A sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 22.1 g NH3. The theoretical yield is 26.9 g. What is the percent yield for this reaction? Reaction: N2(g) + 3 H2 (g) → 2 NH3 (g)

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

The element that has the greatest electronegativity is