When an antacid tablet dissolves in water, the fizz is due to a reaction between sodium hydrogen carbonate (sodium bicarbonate, NaHCO3) and citric acid (H3C6H5O7). 3 NaHCO3(aq) + H3C6H5O7(aq) 3 CO2(g) + 3 H2O(l) + Na3C6H5O7(aq)
How many moles of Na3C6H5O7 can be produced if one tablet containing 0.0117 mol of NaHCO3 is dissolved?

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

What is the molar mass of a gas that has density of 2.054 g/l

Four statements about the development of the atomic model are shown below. a: electrons have wavelike properties. b: atoms have small, negatively charged particles. c. the center of an atom is a small, dense nucleus. d: atoms are hard, indivisible spheres. which order of statements represents the historical development of the atomic model? c-d-a-b c-d-b-a d— в-а — с d-b-c-a