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Avogadro constant or number is the number of atoms in one mole, which is equal to 6.0221415 × 10^23. Edited to: The Avogadro constant is the number of particles (atoms, molecules or compounds) in one mole of a substance. It is the number of atoms in exactly 12g of carbon-12. As for all other elements, one mole of those is found in the relative atomic mass of that substance which is calculated relative to one twelfth of a carbon-12 atom e.g. one mole of oxygen atoms is in 16g of oxygen... and a mole was experiemtally worked out to contain 6.0221415 × 10^23 particles.
The universe has a detachable plastic cover at the back. Remove this cover using a Philips screwdriver. You will see small thumb wheels labeled, Gravitational Constant, Plank's Constant, Boltzman's Constant, Speed of Light, mass of electron, etc. These can be changed by turning the thumb wheel either towards the "+" or "-" signs. Caution! Unless you know exactly what you're up to, don't play around with these dials. If you change these constants even ever so slightly, the results can be quite dramatic and you may not be able to turn them back. For example, if your new settings don't allow the existance of calcium, carbon or iron, then you're goosed!
atomic mass of carbon=12 atomic number of carbon=6
Carbon and oxygen are two natural chemical elements, nonmetals.
The mass of 1 gram of carbon 12 is the same mass as 1 gram of carbon 13.
NEw bones.
Statistically carbon-14 atoms decay at a constant rate.
The half-life of carbon is known in living organisms- the amount of carbon-14 remains constant, after death. no new carbon-14 enters the organism, scientists measure the proportion of carbon-14 in the organism and calculate how it differs from the amount that would have been there if the organism would be alive, from this differenct, they determine the age.
They plant new trees on the same proportion.
Statistically carbon-14 atoms decay at a constant rate.
Carbon-dating. This is a process by which the proportion of carbon-14 in an organism is compared to the proportion know to be in the environment the carbon came from. By comparing the proportions, a scientist can determine the amount of time since the last replacement of the carbon-14, and thus give a rough time of how long ago the organism died.
law of multiple proportion
Basically because Carbon is a relatively light element and carbon fiber is only made of carbon atoms
This is known as 'carbon dating'. You can find out how it works from Wikipedia
22900
Yes, measurements of the ratio of carbon-14 (radioactive) to carbon-12 (nonradioactive) in a sample is used as a type of clock to determine the age of the sample. BTW, ever wonder why C14 dating works? Presumably, the organism is eating a constant proportion of C14 while it lives. So when it dies, the C14 is not being replenished. Sounds awful fishy to me, but what else is there? I would have like the process better if the organism were making C14 at a constant rate-- but alas, not so.
Henry's law constant for Carbon Dioxide at 20 degrees Celsius is: 1,6*10^3 ATM