A New Compound Was Recently Discovered and Found to Have

question 79

Multiple Choice

A new compound was recently discovered and found to have an atomic weight of 342.38 amu.This element has two isotopes,the lighter of which has a mass of 340.91 amu and an abundance of 68.322%.What is the mass of the heavier isotope?

• A) 350.21
• B) 345.55
• C) 342.38
• D) 348.67
• E) 343.29

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Definitions:

Plankton

Tiny organisms that float or drift in water, either freshwater or saltwater, constituting a crucial part of aquatic food webs.

Mutualism

A symbiotic relationship between two species in which both species benefit from the interaction.

Mycorrhizae

Symbiotic associations between fungi and the roots of plants, improving nutrient and water uptake.

Epiphytes

Plants that grow on other plants for physical support but do not extract nutrients from their hosts, thus not parasitic.