Which of the following correctly represents 360 g of water?
(i) 2 moles of `H_(2)O`
ii) 20 moles of water.
iii) `6.022 xx 10^(23)` molecules of water.
iv) `1.2044 xx 10^(25)` molecules of water.

Options

A. only (i)
B. (i) and (iv)
C. (ii) and (iii)
D. (ii) and (iv)

Explanation

To solve the question, we need to determine which of the options correctly represents 360 g of water. We will analyze each option step by step.

### Step 1: Understand the molar mass of water
The molar mass of water (H₂O) is calculated as follows:
- Hydrogen (H) has a molar mass of approximately 1 g/mol, and there are 2 hydrogen atoms in water.
- Oxygen (O) has a molar mass of approximately 16 g/mol.

Thus, the molar mass of water (H₂O) = (2 × 1) + 16 = 18 g/mol.

### Step 2: Evaluate each option

**Option (i): 2 moles of H₂O**
- Calculate the mass of 2 moles of water:
\[ \text{Mass} = \text{Number of moles} \times \text{Molar mass} = 2 \times 18 \text{ g} = 36 \text{ g} \]
- Since 36 g is not equal to 360 g, this option is incorrect.

**Option (ii): 20 moles of water**
- Calculate the mass of 20 moles of water:
\[ \text{Mass} = 20 \times 18 \text{ g} = 360 \text{ g} \]
- Since this is equal to 360 g, this option is correct.

**Option (iii): \(6.022 \times 10^{23}\) molecules of water**
- One mole of any substance contains \(6.022 \times 10^{23}\) molecules and has a mass of 18 g.
- Thus, \(6.022 \times 10^{23}\) molecules of water corresponds to 18 g, not 360 g. This option is incorrect.

**Option (iv): \(1.2044 \times 10^{25}\) molecules of water**
- First, calculate how many moles this number of molecules represents:
\[ \text{Number of moles} = \frac{1.2044 \times 10^{25}}{6.022 \times 10^{23}} \approx 20 \text{ moles} \]
- Now calculate the mass:
\[ \text{Mass} = 20 \times 18 \text{ g} = 360 \text{ g} \]
- Since this is equal to 360 g, this option is also correct.

### Conclusion
The options that correctly represent 360 g of water are:
- Option (ii): 20 moles of water
- Option (iv): \(1.2044 \times 10^{25}\) molecules of water

### Final Answer
The correct answers are options (ii) and (iv).

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