2. Consider the reaction of zinc metal with hydrochloric acid, HCl(aq) as below: Zn (s)
+ HCl(aq) → ZnCl2 (aq) + H2(g)

A. Calculate the moles of HCl needed to react completely with 4.35 moles of zinc.

B. Calculate the grams of zinc chloride produced if 0.345 grams of zinc react
completely.

C. Calculate the mass in grams of hydrogen gas produced if .678 grams of HCl react
completely

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Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.