How many grams of water must be used to dissolve 100.0 grams of sucrose (C₁₂H₂O) to prepare a 0.020 mole fraction of sucrose in the solution?​

In salt water solution,the salt is the blank

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

No copying 15 pts how does a free-body diagram tell you about the net force on an object?