In All Chemical Changes

question 43

Multiple Choice

In all chemical changes,

• A) reactants disappear completely.
• B) all of the reactants must cease to exist.
• C) the weight of products and reactants must balance.
• D) products must be in the same physical state as the reactants.

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Definitions:

The Rat Is Always Right

A principle in behavioral psychology and animal studies asserting that the observed behavior of a rat (or other research subjects) in an experiment is the correct response given their understanding of the situation, highlighting the importance of considering the subject's perspective in experimental design.

Humility

The quality of having a modest or low view of one's importance, often leading to a respectful and considerate behavior towards others.

Scientific Attitude

A mindset characterized by curiosity, skepticism, and humility, alongside the methodical pursuit of knowledge.

Optimistic Outlook

The tendency to maintain a positive attitude and expect good outcomes even in face of difficulties.