In the unit 2 lab, what combination produced a brown bubbly liquid that looks like root-beer? (select the two parts of the combination) chalk nacl kcl baking soda sugar vinegar water citric acid vegetable oil naoh

Find the empirical formula of each of the following compounds. given mass or for each element in a sample of the compound 3,611 g ca; 6.389 g c1

Compare and contrast physical changes with chemical changes.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.