Question

in 12g of carbon, there are 6.02*10^23 carbon atoms. if you could count 1 atom per second how long would it take to count the atoms in 1g of carbon?

Answer 1

Answer:

The number 6.02 × 10 23 is called Avogadro’s number , the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of elements, the representative particle is the atom. Iron, carbon, and helium consist of iron atoms, carbon atoms, and helium atoms, respectively. Seven elements exist in nature as diatomic molecules and they are H 2 , N 2 , O 2 , F 2 , Cl 2 , Br 2 , and I 2 . The representative particle for these elements is the molecule. Likewise, all molecular compounds such as H 2 O and CO 2 exist as molecules and so the molecule is their representative particle.  For ionic compounds such as NaCl and Ca(NO 3 ) 2 , the representative particle is the formula unit. A mole of any substance contains Avogadro’s number (6.02 × 10 23 ) of representative particles.

Answer 2

12g = molar mass of carbon

also, 1 mole = 6.022×10²³ = molar mass of any atom

So, we can say that 12g = 6.022×10²³