The Purity of a Sample Containing Zinc and Weighing 0

question 29

Multiple Choice

The purity of a sample containing zinc and weighing 0.312 g is determined by measuring the amount of hydrogen formed when the sample reacts with an excess of hydrochloric acid.The determination shows the sample to be 84.0% zinc.What amount of hydrogen (measured at STP) was obtained?

• A) L
• B) g
• C) mole
• D) molecules
• E) atoms

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Definitions:

Strain

In biology, a genetic variant or subtype of microorganisms, such as viruses or bacteria. In physics, it refers to deformation resulting from stress.

Swap Genes

The process of exchanging genetic material between two chromosomes or fragments, leading to genetic recombination or horizontal gene transfer.

Cetaceans

A group of marine mammals that includes whales, dolphins, and porpoises, characterized by their fully aquatic lifestyle and adaptations such as flippers and blowholes.

Pakicetus

An extinct genus of early whales that is considered a crucial link in the evolution from land mammals to aquatic cetaceans.