The balanced equation represents the reaction between carbon monoxide and oxygen to produce carbon dioxide: 2CO(g)+O 2 (g) 2CO 2 (g)+ener Determine the number of moles of oxygen gas needed to completely react with 8.0 moles of carbon monoxide gas.

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

What is happening when the water inside a kettle heats up and begins to boil