At 20°C,a 0

question 143

Multiple Choice

At 20°C,a 0.376 M aqueous solution of ammonium chloride has a density of What is the mass % of ammonium chloride in the solution? The formula weight of NH₄Cl is 53.50 g/mol.

• A) 0.381
• B) 0.705
• C) 0.374
• D) 2.68
• E) 2.00

---

Definitions:

Primary Reinforcer

A naturally occurring stimulus like food or drink that is needed for survival and that intrinsically motivates or satisfies physiological needs.

Positive Reinforcer

A positive reinforcer is any stimulus that, when presented after a behavior, increases the likelihood of that behavior being repeated.

Secondary Reinforcer

Any reinforcer that becomes reinforcing after being paired with a primary reinforcer, such as praise, tokens, or gold stars.

Extinction

In psychology, the gradual weakening and eventual disappearance of a conditioned response when the conditioned stimulus is no longer paired with an unconditioned stimulus.