20 points and brainliest 45) write a balanced net ionic equation for the following reaction. (2 points) h3po4 (aq) + ca(oh)2 (aq)  ca3(po4)2 (aq) + h2o (l) 46) how many liters of o2 are needed to react completely with 45.0 l of h2s at stp? (2 points) 2h2s (g) + 3o2 (g)  2so2 (g) + 2h2o (g) 47) describe the shapes and relative energies of the s, p, d, and f atomic orbitals. (3 points) 48) explain how atoms (ions) are held together in an ionic bond. give an example of an ionic compound. (3 points)