Calcium Hydride (CaH₂, 42 $\rightarrow$ Ca(OH)₂ (S) + 2H₂ (G)
A)8

question 49

Multiple Choice

Calcium hydride (CaH₂, 42.10 g/mol) is so reactive with water 18.02 g/mol) that it can be used to remove traces of water from nonaqueous solvents.What mass of the excess reactant will be left over if 24.6 g CaH₂ is added to a large volume of solvent that contains 14.0 g H₂O?
CaH₂ (s) +2H₂ O(l) $\rightarrow$ Ca(OH) ₂ (s) + 2H₂ (g)

• A)8.24 g CaH₂ will be left over.
• B)5.26 g H₂O will be left over.
• C)16.4 g CaH₂ will be left over.
• D)3.45 g H₂O will be left over.
• E)Both are completely consumed.

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Associative Play

A stage of play in early childhood where children play together, engaging in similar activities or sharing materials without having a formal organization or goals.

Intrinsic Motivation

The drive to engage in activities for the inherent satisfaction or pleasure derived from the activity itself, rather than for some separable consequence.

Mildred Parten

An American sociologist known for her work on the social development of children and her study on children's play.

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Originating from outside, not inherent or intrinsic; often used to describe external motivations or rewards.