What Energy Must Be Added or Given Off in a Reaction

question 3

Multiple Choice

What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen,1.007 825 u;neutron,1.008 665 u;helium,4.002 602 u;also,1 u = 931.5 MeV/c²)

• A) 20.7 MeV added
• B) 20.7 MeV given off
• C) 28.3 MeV given off
• D) 28.3 MeV added

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Definitions:

Translocation

The process by which substances are transported inside a plant or the movement of chromosomes or segments of chromosomes to new positions during cell division.

Transpiration

The method through which water moves inside plants from the roots to tiny openings on the lower side of the leaves, where it transforms into vapor and gets emitted into the air.

Mutualistic Relationships

Interactions between two species where both benefit and often depend on one another for survival or for certain benefits.

Plant Roots

The part of a plant that typically lies below the surface of the soil and is responsible for water and nutrient absorption.