One mole of `H_(2)O` corresponds to

Options

A. 22.4 L at 1 atm and `25^(@)C`
B. `6.023xx10^(23)` atoms of hydrogen
C. 18 g
D. 1 g

Answer

To solve the question "One mole of H₂O corresponds to", we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understanding the Concept of a Mole
A mole is a unit used in chemistry to express amounts of a chemical substance. One mole of any substance contains exactly \(6.022 \times 10^{23}\) entities (atoms, molecules, etc.). This number is known as Avogadro's number.

**Hint:** Remember that a mole is a counting unit in chemistry, similar to a dozen.

### Step 2: Identifying the Composition of Water
Water (H₂O) consists of two hydrogen (H) atoms and one oxygen (O) atom. Therefore, in one mole of water, there are:
- 2 moles of hydrogen atoms
- 1 mole of oxygen atoms

**Hint:** Break down the molecular formula to identify the number of each type of atom present.

### Step 3: Calculating the Total Number of Atoms in One Mole of Water
In one mole of water (H₂O), the total number of atoms can be calculated as follows:
- Number of hydrogen atoms = 2 (from H₂)
- Number of oxygen atoms = 1 (from O)

Thus, the total number of atoms in one mole of H₂O is:
\[ 2 \text{ (H)} + 1 \text{ (O)} = 3 \text{ atoms} \]
Therefore, in terms of entities, one mole of H₂O corresponds to \(3 \times 6.022 \times 10^{23}\) atoms.

**Hint:** Always sum the contributions of each type of atom to find the total.

### Step 4: Determining the Mass of One Mole of Water
To find the mass of one mole of water, we need to calculate its molar mass:
- Atomic mass of hydrogen (H) = approximately 1 g/mol
- Atomic mass of oxygen (O) = approximately 16 g/mol

The molar mass of water (H₂O) is calculated as follows:
\[ \text{Molar mass of H₂O} = (2 \times 1) + (1 \times 16) = 2 + 16 = 18 \text{ g/mol} \]

**Hint:** Use the periodic table to find atomic masses and remember to multiply by the number of atoms in the formula.

### Step 5: Conclusion
From the above calculations, we can conclude:
- One mole of H₂O corresponds to \(6.022 \times 10^{23}\) molecules of water.
- One mole of H₂O has a mass of 18 grams.

Thus, the correct answer to the question "One mole of H₂O corresponds to" is that it corresponds to 18 grams of water.

### Final Answer:
One mole of H₂O corresponds to 18 grams.