A scientist is preparing Aluminum Oxide (Al2O3) by reacting solid Aluminum and Oxygen gas together as shown by this chemical equation:4Al + 3O2 → 2Al2O3 The scientist measures the mass of Aluminum before the reaction and finds 107.92 grams. The scientist measures the mass of Aluminum Oxide after the reaction and finds 299.91 grams. The scientist concludes that 95.99 grams of Oxygen gas must have reacted with the Aluminum. Explain the law that the scientist used to predict the amount of Oxygen gas in the reaction and how that law was used to find the amount of Oxygen gas.

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic