water, scientifically represented as h2o, consists of ______ hydrogen atoms covalently bonded to an oxygen atom.
the polarity of water arises due to the unequal sharing of electrons, leading to a partial negative charge (δ-) near the ______ atoms.
______ refers to the attraction between molecules of the same substance and is responsible for water molecules sticking together.
______ involves the attraction between different substances and allows water to cling to other surfaces.
cohesion creates a film on the water’s surface, exhibiting ______ tension, which enables certain insects to walk on water without sinking.
adhesion, coupled with ______, facilitates water transport in plants through xylem vessels.
water’s ability to act as a universal solvent is due to its unique molecular structure and ______.

Question

Accepted Answer

### 1st Question
# Brief Explanations:
The chemical formula of water is $H_2O$, which means each water molecule has 2 hydrogen atoms bonded to 1 oxygen atom.
# Answer:
2 (two)

### 2nd Question
# Brief Explanations:
In a water molecule ($H_2O$), oxygen is more electronegative than hydrogen. So, electrons are shared unequally, and the oxygen atom has a partial negative charge ($\delta^-$) because it pulls the shared electrons closer.
# Answer:
oxygen

### 3rd Question
# Brief Explanations:
Cohesion is defined as the attractive force between molecules of the same substance. For water, cohesion makes water molecules stick to each other (e.g., forming droplets).
# Answer:
Cohesion

### 4th Question
# Brief Explanations:
Adhesion is the attractive force between molecules of different substances. In the context of water, adhesion allows water to stick to other surfaces (like the sides of a glass or the walls of plant xylem).
# Answer:
Adhesion

### 5th Question
# Brief Explanations:
Surface tension is the property of a liquid's surface that allows it to resist an external force, due to cohesion between liquid molecules. The cohesive forces create a "film" on the water's surface, which is surface tension, and this allows insects like water striders to walk on water.
# Answer:
surface

### 6th Question
# Brief Explanations:
In plants, water transport in xylem relies on both adhesion (water sticking to the xylem walls) and cohesion (water molecules sticking to each other). These two forces work together to pull water up from the roots to the leaves (capillary action, which is a result of adhesion and cohesion).
# Answer:
cohesion

### 7th Question
# Brief Explanations:
Water is a universal solvent mainly because of its polarity (from its molecular structure, with oxygen being more electronegative, creating partial charges) and its ability to form hydrogen bonds. The polarity allows it to interact with and dissolve many ionic and polar substances, and hydrogen bonding helps in dissolving substances by surrounding solute particles.
# Answer:
polarity (or hydrogen bonding, either is acceptable as a key factor; polarity is more related to the molecular structure aspect here as the question mentions "unique molecular structure and...")

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