What is avogadro’s number?
a. the number of atoms in exactly 14.00 g of carbon-12
b. the number of atoms in a kilogram of any substance
c. the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance
d. the number of atoms, molecules, ions, formula units, or other particles in a gram of a substance

 the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance (option C)

Avogadro’s number or Avogadro’s constant is 6.02 * 10^-23 mol ^-1. It is the number of atoms per mole of the carbon-12 isotope. For atoms the mass of Avogadro’s number of particles is equal to the relative atomic mass in grams. So the mass of Avogadro’s number of hydrogen atoms is 1g and the mass of Avogadro’s number of chlorine atoms is 35.5g

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2