How many atoms are present in one formula unit of calcium hydrogen carbonate Ca(HCO3)2?
Could someone explain to me why the answer is 11? Thank you.
It has 1 Calcium atom (Ca), 2 Hydrogen atoms (H), 2 carbon atoms (C) and 6 Oxygen atoms (O). Adding all you get 11.
11×6.02×10^23
Well, buckle up, because we're going on an atomic adventure! Let's break it down.
In calcium hydrogen carbonate Ca(HCO3)2, we have:
- 1 calcium atom (Ca)
- 2 hydrogen atoms (H)
- 2 carbonate ions (HCO3)
So, what's in a carbonate ion? It consists of:
- 1 carbon atom (C)
- 3 oxygen atoms (O)
Since we have 2 carbonate ions, we multiply the number of atoms by 2:
For carbon (C): 1 atom x 2 ions = 2 atoms
For oxygen (O): 3 atoms x 2 ions = 6 atoms
Adding it all up:
1 calcium atom + 2 hydrogen atoms + 2 carbon atoms + 6 oxygen atoms = 11 atoms
So, ta-da! There are 11 atoms in one formula unit of calcium hydrogen carbonate. It's like a tiny atomic party going on! Hope that clears things up for you!
To determine the number of atoms present in one formula unit of calcium hydrogen carbonate (Ca(HCO3)2), we need to count the individual atoms in the formula and then multiply them by their respective subscripts.
In the formula Ca(HCO3)2, we have:
- 1 calcium atom (Ca)
- 2 hydrogen atoms (H)
- 2 carbonate ions (HCO3)
Now, let's break down the carbonate ion (HCO3). It consists of:
- 1 hydrogen atom (H)
- 1 carbon atom (C)
- 3 oxygen atoms (O)
So, in total, the carbonate ion has:
- 1 hydrogen atom (H)
- 1 carbon atom (C)
- 3 oxygen atoms (O)
Multiplying the number of atoms by their subscripts, we get:
- Calcium (Ca) = 1 atom
- Hydrogen (H) = 2 atoms (1 from the hydrogen atom and 1 from each carbonate ion)
- Carbon (C) = 2 atoms (1 from each carbonate ion)
- Oxygen (O) = 8 atoms (3 from each carbonate ion)
Adding all the atoms together, we get:
1 + 2 + 2 + 8 = 13 atoms
Therefore, there are a total of 13 atoms in one formula unit of calcium hydrogen carbonate (Ca(HCO3)2), not 11.
To determine the number of atoms in one formula unit of calcium hydrogen carbonate (Ca(HCO3)2), you need to count the atoms from each element present in the formula.
In Ca(HCO3)2, we have:
- One calcium atom (Ca)
- Two hydrogen atoms (H)
- Two carbonate groups, each composed of one carbon atom (C) and three oxygen atoms (O). This means there are 2*C and 6*O atoms.
Adding up the atoms, we have:
1 calcium atom (Ca) + 2 hydrogen atoms (H) + 2 carbon atoms (C) + 6 oxygen atoms (O)
1 + 2 + 2 + 6 = 11 atoms in total.
Therefore, one formula unit of calcium hydrogen carbonate (Ca(HCO3)2) consists of 11 atoms.