The value of this decimal numbers is very popular and known to be "pie".
Which is basically equals to 22/7.
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Charles Derwin was a notorious imposter of the better known Charles Darwin.
I believe you are referring to Sodium bicarbonate or better known as baking soda. It has the forumula NaHCO3
De-ionised water is normally known as demineralised water. It?æis water whose mineral ions such as calcium, sodium and iron has been removed.
Isaac Newton -- invented calculus and a type of telescope that was more compact, but gave better magnification to see planets, stars, etc.
Diamond is the hardest material known to man but not the toughest. Toughness is a measurement of how resistant an object is to being broken or chipped. While better than most gems diamond is not as tough as materials such as steel or titanium. As to what is the toughest material known I would say graphene which is a single sheet of carbon atoms but it is only practical on the macroscopic level.