How much pure oxygen can be produced by a molecular sieve after absorbing nitrogen?

The process of oxygen production using a molecular sieve involves the selective absorption of nitrogen from air, leaving behind a higher concentration of oxygen. Molecular sieves are designed to capture nitrogen molecules while allowing oxygen molecules to pass through. This method is commonly employed in oxygen concentrators and other oxygen-generating devices.

When nitrogen is absorbed, the remaining gas primarily consists of oxygen, resulting in a high concentration of pure oxygen. The advanced technology and efficiency of molecular sieves can achieve an oxygen concentration of up to 90%. This high level is crucial for applications that require substantial oxygen purity, such as in medical settings or for high-performance breathing apparatus.

Thus, the ability of a molecular sieve to absorb nitrogen efficiently accounts for the significant yield of pure oxygen, making the correct assessment that it can produce up to 90% pure oxygen.