How many calcium atoms are in a formula

unit of calcium hydrogen carbonate?

1. 1
2. 2
3. 4
4. 3
5. 5

CaHCO3

Hmmmm

OMG, you are correct.

Thank you haha I was just confused because it's Ca(HCO3)2 and I didn't know if it was a tricky question

To determine the number of calcium atoms in a formula unit of calcium hydrogen carbonate, we need to first understand the chemical formula of calcium hydrogen carbonate.

The chemical formula for calcium hydrogen carbonate is Ca(HCO3)2.

In this formula, the subscript "2" after the parentheses (HCO3) indicates that there are two sets of the HCO3 group. Each set contains one carbon atom (C), three oxygen atoms (O), and one hydrogen atom (H).

Next, we look at the coefficient before the formula, which is "1" for calcium. This coefficient represents the number of calcium atoms in the formula unit.

Therefore, the answer is:

1. 1 calcium atom