Question

23 multiple choice 1 point
what is the theoretical yield?
the actual amount of product obtained from a chemical reaction
the maximum amount of product that can be produced by the given reaction conditions
the amount of reactant left over after the reaction has finished
the reactant which is consumed first
clear my selection
24 multiple choice 1 point
according to this image, which letter represents a chemical species?
(chemical equation with letters a, b, c, d labeled)
c
a
d
b
clear my selection

Explanation:

Question 23

• The first option describes actual yield (not theoretical).
• The second option: Theoretical yield is the maximum product possible from given reactants/conditions (calculated via stoichiometry).
• The third option is leftover reactant (not yield).
• The fourth option is limiting reactant (not yield).

In a chemical equation, chemical species are reactants, products, or intermediates (represented by chemical formulas). Let's analyze the labels:

• Label A points to \( \text{CH}_4(\text{g}) \) (a reactant, a chemical species).
• Label B likely points to a coefficient or state (not a species).
• Label C likely points to a coefficient or state (not a species).
• Label D points to a product formula but A is a reactant formula (both are species, but A is a reactant formula here). Wait, recheck: The equation is \( \text{CH}_4(\text{g}) + \text{O}_2(\text{g})

ightarrow \text{CO}_2(\text{g}) + \text{H}_2\text{O}(\text{l}) \). So A points to \( \text{CH}_4(\text{g}) \) (chemical species), B/C may be coefficients/arrows, D to \( \text{H}_2\text{O}(\text{l}) \) (also species). But the options: A is the label for \( \text{CH}_4 \), so A represents a chemical species.

Answer:

B. the maximum amount of product that can be produced by the given reaction conditions

Question 24