Hydrated copper sulphate is a blue crystalline solid. when heated, it changes to anhydrous copper sulphate, a white powder. what occurs in that process? ( a. loss of water. ( b. absorption of water. ( c. loss of oxygen. ( d. oxidation

Express the following number in scientific notation. 0.026890 =

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 grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.