air purifier compared

If I have 05 ppm how to become parts per billion?

I'm going to buy an air purifier and have heard bad things about the output of the ozone layer by the ionic breeze. I am checking the others that produce less I think, but it is necessary to compare parts per million to parts per billion.

Some of the previous answers are incorrect. One part per million = 1:1,000,000 One part per billion = 1:1,000,000,000 If I said that was 10 centimeters, when it becomes a smaller unit (mm) the number is bigger not smaller! You would not say that 10 cm = 0.1 mm? N, 10 cm = 100 mm, right? It's the same here … 0.05 ppm x 1000 (to convert to ppb, ie, the magnitude difference between ppm and ppb) = 50 ppb.

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