Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: n2(g)+3h2(> 2nh3(g).

a sample of n2 requires 3.0 g of h2 for complete reaction.

a)0.76

b)1.2

c)14.0

d)17.2

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

Summarize possible ways in which phases of matter could combine to form a solution.