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5-7% is acceptable
5 ppm
1000 colony forming unit/ml in water...500 cfu/ml is considered standard for acceptable drinking water
An acceptable standard deviation depends entirely on the study and person asking for the study. The smaller the standard deviation, the more acceptable it will be because the less likely there are to be errors.
At standard temperature and pressure, chlorine will be a gas.
Chlorine is already a gas under standard conditions.
Standard Test Method for Residual Chlorine in Water
It may or may not be acceptable. If the mean is 12, then no it is not acceptable. If the mean is 1000, then it may be acceptable depending on the criteria given.
The element chlorine at standard temperature and pressure is molecular and has the formula Cl2.
At room temperature and standard pressure the element Chlorine is a gas.
'Acceptable' is an adjective: 'He did not display an acceptable standard of behaviour.'
The acceptable water quality level for coliform bacteria in drinking water is zero colony-forming units (CFU) per 100 milliliters as specified by the US Environmental Protection Agency (EPA). The presence of coliform bacteria indicates possible contamination from fecal matter and poses a health risk. Drinking water should be regularly tested to ensure it meets this standard.