Determine whether a solid forms when solution containing the following ionic compounds are mixed. If so, write the ionic equation and the net ionic equation. a. KCl (aq) and Na2S (aq)
b. AgNO3 (aq) and K2S (aq)
c. CaCl2 (aq) and Na2SO4 (aq)
d. CuCl2 (aq) and Li3PO4 (aq)

Classify this reaction: 2al+n2-> aln.

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?