10g of marble was added to 15 grams of dilute hydrochloric acid, product formed is calcium chloride, water and carbon dioxide. which of the following is true?

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.