Question

How many atoms of each element are in the chemical formula Ca(OH)2?

1 calcium, 1 oxygen, and 1 hydrogen
1 calcium, 2 oxygen, and 2 hydrogen
2 calcium, 1 oxygen, and 2 hydrogen
2 calcium, 2 oxygen, and 2 hydrogen

Answer 1

Explanation:

• one molecule of a compound will have = 6.022 × 10 ^23 molecules
• number of atoms in a molecule is = 6.022 × [tex]{10}^{23} x number of atom in a molecule

• x number of atom in a molecule one molecule of CA (OH)2 has = 5 atoms

• one molecule of CA(OH)2 has = 6.022× 10^23 atom.

☆ I calcium,2 oxygen and 2 hydrogen ✔

Answer 2

1 calcium, 2 oxygen and 2 hydrogen are present in given formula.

• Chemical compound is the one containing similar or different elements bonded together though chemical bonds. Chemical bond can be ionic or covalent.
• Elements have specific type of atoms present in them, which further constitute proton, neutron and electrons.
• As evident in given formula, OH is twice in number and hence two atoms are present. OH or hydroxyl has charge of -1 and calcium has charge of +2.