Âm thanh chia sẻ

Let’s begin with a simple thought. Everything in chemistry starts with one question… how much? Not what it is, not why it reacts… but how much of it exists. Because atoms are unbelievably tiny. So tiny that counting them one by one would take longer than waiting for your phone to charge at 1 percent. So chemists created a shortcut. They said, instead of counting atoms individually, let’s count them in groups. This group is called a mole. One mole contains 6.022 into 10 to the power 23 part