Answer:
moist air is less dense than dry air because water has a lower molecular weight than nitrogen and oxygen
Answer:
Water vapor is a relatively light gas when compared to diatomic Oxygen and diatomic Nitrogen. Thus, when water vapor increases, the amount of Oxygen and Nitrogen decrease per unit volume and thus density decreases because mass is decreasing.
(2) an isotope (4) a compound
Any substance composed of two or more elements that are chemically combined in a fixed proportion is known as a Compound. Thus, it's D.
Elements may be defined as any substance that cannot be disintegrated into more superficial substances by standard chemical processes.
In chemistry, an isomer may be defined as those molecules which the same molecular formulas, but different arrangements of atoms.
An Isotope may be defined as an atom that bears the same atomic number and chemical identities but possesses a different atomic mass.
A solution may be defined as a homogeneous mixture of one or more solutes disbanded in a specific solvent.
Therefore, the correct option for this question is D.
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(2) donates an H+ (4) donates an H-
According to the Brønsted-Lowry acid-base theory, water is acting as an acid when a water molecule donates an H+ ion. This also illustrates that water can behave as both an acid and a base due to its amphoteric nature.
According to the Brønsted-Lowry theory of acids and bases, water acts as an acid when a H2O molecule donates an H+. This is because an acid is defined as a substance that can donate a proton, which is a hydrogen ion (H+). Water (H2O) can act as both an acid and a base due to its amphoteric nature, but in this context where we have to choose between these four options, water acts as an acid when it donates an H+. An example of this is when water donates an H+ to ammonia (NH3), producing the ammonium ion (NH4+) and a hydroxide ion (OH-).
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