BSC Ch. 2 Exam Questions Correctly Answered.
When H20 is added to a compound i a chemical equation, a new compound can be formed via what type of reaction? - CORRECT ANSWER ?
Water is critical to sustain life. One of its major roles is creating and breaking bonds in chemical reactions. Othe...
When H20 is added to a compound i a chemical equation, a new compound can be formed via what type
of reaction? - CORRECT ANSWER ?
Water is critical to sustain life. One of its major roles is creating and breaking bonds in chemical
reactions. Other significant roles of water include. - CORRECT ANSWER 1. acting as a solvent in the
transport of dissolved substances around the body. 2. acting as the medium for white blood cell
formation. 3. maintaining body temperature homeostasis. 4. composing up to 30% of the human body.
If the products in a chemical equation include H20, what specific type of reaction is occurring? Is a
polymer being made or broken down in this equation? - CORRECT ANSWER ?
Adding Nh3 (ammonia) to water makes NH4. What will be the general pH of this new solution and what
will happen to the ion concentrations. - CORRECT ANSWER ?
10-20% of the body weight in humans is from water - CORRECT ANSWER False
Water bathes organs in fluid, which provides protection and support. - CORRECT ANSWER true
Water is the universal solvent, transporting dissolved substance in bodily fluids. - CORRECT ANSWER
true
Water plays a major role in our bodies' chemical reactions. - CORRECT ANSWER true
Water plays a much more important role in plants than in animals, use to the role of water in
photosynthesis. - CORRECT ANSWER false
, They have the same # of electrons in their outermost shells. - CORRECT ANSWER ?
They have two electron shells - CORRECT ANSWER Carbon and Nitrogen
Their outermost electron shell is full. - CORRECT ANSWER Helium and Argon
They have one electron shell. - CORRECT ANSWER Hydrogen and Helium
They have three electron shells. - CORRECT ANSWER Sodium and Chlorine
If you were to create a planet capable of supporting life forms similar to those on earth the necessary
elements to in include would be. - CORRECT ANSWER CO2, HYDROGEN, O, C6H12O6
Electrons that orbit the nucleus of an atom - CORRECT ANSWER randomly move between different
shells. have lower potential energy as they move farther from the nucleus.
Carbon 14 has how many neutrons? - CORRECT ANSWER 8
Photosynthesis reaction. what occurs during it? - CORRECT ANSWER Substances are changed it other
substances by the making or breaking of chemical bonds.
A polar covalent bond is created when - CORRECT ANSWER bonded atoms have unequal pull on the
shared electron, so that the electron spends more time around one atom than the other.
The unequal sharing of electrons between the oxygen and hydrogen atoms within a water molecule
makes water a _____ molecule. - CORRECT ANSWER polar
As a result of the electron configuration of a water molecule, water is a great _____ because water can
break up and surround a _______, as long as it is not ________, dissolving it into the solution. -
CORRECT ANSWER solvent, solute, nonpolar
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