Use Ksp values to predict if a precipitate will form when equal volumes of the following solutions are mixed: 0.10 M of Pb(NO3)2 and 0.030 M of NaF

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

What is the percent by mass of oxygen in fe2o3

2. what two items do autotrophs take from the environment to produce their food? 3. what are the two items that are released during transpiration from leaves? 4. what are the two membranes of the system? a. what are the two stages of photosynthesis? what are the two parts of photosynthesis?