`H_(2)O_(2)` is

Options

A. Lighter than water
B. Denser than water
C. More viscous than water
D. Less viscous than water

Answer

To determine the properties of hydrogen peroxide (H₂O₂) in comparison to water (H₂O), we will analyze the options provided in the question step by step.

### Step 1: Identify the Chemical and Physical Properties of H₂O₂
- **Chemical Name**: H₂O₂ is known as hydrogen peroxide.
- **Molar Mass**: The molar mass of H₂O₂ is 34 grams per mole, while the molar mass of water (H₂O) is 18 grams per mole.

**Hint**: Remember that molar mass can influence density and other physical properties.

### Step 2: Compare Densities
- **Density of H₂O₂**: The density of hydrogen peroxide is approximately 1.45 grams per cubic centimeter (g/cm³).
- **Density of Water**: The density of water is approximately 1.00 grams per cubic centimeter (g/cm³).

**Hint**: Higher density means that the substance is heavier for the same volume.

### Step 3: Determine Which is Denser
Since the density of H₂O₂ (1.45 g/cm³) is greater than that of water (1.00 g/cm³), we conclude that:
- **H₂O₂ is denser than water**.

**Hint**: When comparing densities, always look for the numerical values to determine which is greater.

### Step 4: Compare Viscosity
- **Viscosity of H₂O₂**: The viscosity of hydrogen peroxide is about 1.245 centipoise (cP).
- **Viscosity of Water**: The viscosity of water is approximately 1.00 centipoise (cP).

**Hint**: Viscosity indicates how thick or thin a fluid is; higher viscosity means a thicker fluid.

### Step 5: Determine Which is More Viscous
Since the viscosity of H₂O₂ (1.245 cP) is greater than that of water (1.00 cP), we conclude that:
- **H₂O₂ is more viscous than water**.

**Hint**: When comparing viscosities, again, look for the numerical values to see which fluid flows more easily.

### Conclusion
Based on the analysis:
- H₂O₂ is **denser than water** (option B).
- H₂O₂ is **more viscous than water** (option C).

### Final Answer
H₂O₂ is **denser than water** and **more viscous than water**.