Given that the molar mass of NaHCO3 is 84.01g/mol, calculate the number of moles of NaHCO3 that reacted with 1.400g. an autoclave is used to sterilize surgical equipment because
The correct answer and explanation is :
To calculate the number of moles of sodium bicarbonate (NaHCO₃) that reacted with 1.400 g, we use the formula:
[
\text{Moles} = \frac{\text{Mass}}{\text{Molar Mass}}
]
Given:
- Mass of NaHCO₃ = 1.400 g
- Molar mass of NaHCO₃ = 84.01 g/mol
[
\text{Moles of NaHCO₃} = \frac{1.400}{84.01} = 0.01667 \text{ moles}
]
Explanation:
The calculation above determines the number of moles of NaHCO₃ present in 1.400 g of the compound. The molar mass of sodium bicarbonate (84.01 g/mol) is the sum of the atomic masses of sodium (Na), hydrogen (H), carbon (C), and oxygen (O) in the compound.
Importance of an Autoclave in Sterilization
An autoclave is used to sterilize surgical equipment because it uses high-pressure steam at high temperatures to kill bacteria, viruses, fungi, and spores. The standard autoclaving process typically operates at 121°C (250°F) under 15 psi pressure for about 15-20 minutes. This method is effective because:
- Moist Heat Penetration: Steam allows deep penetration into surgical instruments, ensuring that all microbes are killed.
- Denaturation of Proteins: The high temperature causes microbial proteins to lose their structure, leading to cell death.
- Spore Destruction: Some bacteria produce heat-resistant spores, but autoclaves can destroy them at high temperatures.
- Reliable & Efficient: Unlike chemical sterilization, which may leave residues, autoclaving provides a clean and safe method for sterilizing medical tools.
Thus, autoclaves are essential in hospitals, laboratories, and research centers to maintain sterile conditions and prevent infections.