Will distilled water typically contain fewer than 10 cfu/mL of microorganisms?

Yes, distilled water will typically contain fewer than 10 cfu/mL due to the distillation process, which involves boiling the water and then collecting the condensed steam, leaving many contaminants behind. This process is effective in removing microorganisms, resulting in very low levels of colony-forming units (cfu) per milliliter.

Source: Water treatment engineering fundamentals

Can pure steam be condensed back into liquid by cooling the steam?

Yes, pure steam can be condensed back into liquid by cooling the steam, as it follows the fundamental principles of thermodynamics where a change in state from gas to liquid occurs when the vapor is cooled to its dew point.

Source: Physical chemistry principles of aqueous systems