A49.2 g sample of solid iron was heated from 16.2c to 58.9c. what ws the energy change? solve for q(heat energy).iron has a specific heat value of .4494

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

How many moles of al3+ ions are in 1.25 moles of al2o3