Question

question 4
k₂co₃

of molecules is

of elements is

there are potassium atoms
there are carbon atoms
there are oxygen atoms

Explanation:

Step1: Identify number of molecules

The given formula represents 1 molecule of potassium carbonate, so the number of molecules is 1.
1

Step2: Identify number of elements

The elements present are potassium (K), carbon (C), and oxygen (O), so the number of elements is 3.
3

Step3: Count potassium atoms

The sub - script of K is 2, so there are 2 potassium atoms.
2

Step4: Count carbon atoms

The sub - script of C is 1 (implied when no sub - script is written), so there is 1 carbon atom.
1

Step5: Count oxygen atoms

The sub - script of O is 3, so there are 3 oxygen atoms.
3

Answer:

of molecules is 1

of elements is 3

There are 2 Potassium atoms
There are 1 Carbon atoms
There are 3 Oxygen atoms