A Solution Prepared by Dissolving 4

question 57

Multiple Choice

A solution prepared by dissolving 4.00 g KCl in 36.0 g H₂O is said to be:

• A) 11.1% KCl by mass
• B) 0.100% KCl by mass
• C) 0.111% KCl by mass
• D) 10.0% KCl by mass
• E) 9.00% KCl by mass

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Definitions:

K-Pg Boundary

The geological signature marking the end of the Cretaceous period and the beginning of the Paleogene, associated with the mass extinction event that killed the dinosaurs.

Meteorite Impact

A phenomenon where a meteoroid enters Earth's atmosphere and collides with the Earth's surface, potentially causing significant ecological and geological changes.

Embryonic Development

The process by which an embryo forms and develops, starting from a single fertilized cell through to a multi-cellular organism, involving cell division, differentiation, and morphogenesis.

Conservation of Genes

The principle that certain genes are preserved and remain unchanged throughout the evolution of species.