As defined in the lecture, identify the “gas evolution” reac…

As defined in the lecture, identify the “gas evolution” reactions among the following: 2 HCl (aq)  +  K2CO3 (aq)  →  H2O (l)  +  CO2 (g)  +  2 KCl (aq) CH4 (g)  +  2 O2 (g)  →  CO2 (g)  +  2 H2O (l) 2 HCl (aq)  +  K2S (aq)  →  H2S (g)  +  2 KCl (aq)

What metric unit of measure might you use to evaluate the fo…

What metric unit of measure might you use to evaluate the following items?  Which unit would most likely be used.   length of a flag pole? [45] Weight of a boat [46] Volume of a small beaker [47] Length of a pencil [48] weight of a large animal [49] volume of a large Dr. Pepper bottle [50]

Which of these test tubes shows a positive reaction in a Biu…

Which of these test tubes shows a positive reaction in a Biuret’s test? (write the letter of your answer) [33] The Biuret’s test is an experiment used to determine the presence of which major organic molecule type? (which macromolecule, one word answer) [34]