A calorie is not a metric unit but the joule is, 1 calorie is approximately 4.2 joule.
A gram of hydrogen does not exactly have 1 mole of particles. The historical definition for the mole was the count of atoms in 12 grams of the ¹²C carbon isotope, which is slightly different.
The historical definition for a mole is a little underground mammal. Then you science geeks decided to just screw it all up because you couldn’t be bothered to make your own word. A molar’s a mole tooth, dangert!
A calorie is not a metric unit but the joule is, 1 calorie is approximately 4.2 joule. A gram of hydrogen does not exactly have 1 mole of particles. The historical definition for the mole was the count of atoms in 12 grams of the ¹²C carbon isotope, which is slightly different.
The historical definition for a mole is a little underground mammal. Then you science geeks decided to just screw it all up because you couldn’t be bothered to make your own word. A molar’s a mole tooth, dangert!