Zinc hydroxide [Zn(OH)2] Molar Mass (With Calculations)

Molar mass of Zinc hydroxide [Zn(OH)2] is 99.394 g/mol.

Well, now you have come to know the molar mass of Zn(OH)2.

But how can you get this value?

Let me show you the calculation to get the molar mass of Zn(OH)2 (or Zinc hydroxide).

If you are a visual learner like me, then here is a short one minute video for you.

Zinc hydroxide [Zn(OH)2] Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of Zn(OH)2 (or Zinc hydroxide).

Because the molar mass of any molecule (or compound) can be calculated by simply adding the molar masses of individual atoms.

Now here we have to find the molar mass of Zn(OH)2 (or Zinc hydroxide).

So for that, have a look at the periodic table given below.

You can see the molar mass value of all the atoms from this periodic table.

Now in Zn(OH)2, there are Zinc atom, Oxygen atoms and Hydrogen atoms.

So let’s look at the molar mass of Zinc, Oxygen and Hydrogen from the above periodic table.

You can see that;

The molar mass of Zinc is 65.38 g/mol. ^[1]

The molar mass of Oxygen is 15.999 g/mol. ^[2]

The molar mass of Hydrogen is 1.008 g/mol. ^[3]

Now, to calculate the molar mass of Zn(OH)2, you just have to add the molar mass of all the individual atoms that are present in Zn(OH)2.

So, Molar mass of Zn(OH)2 = (Molar mass of Zinc atom) + (Molar mass of Oxygen atom + Molar mass of Hydrogen atom) × 2
= (65.38) + (15.999 + 1.008) × 2
= (65.38) + (17.007) × 2
= (65.38) + (34.014)
= 99.394 g/mol

Hence the Molar mass of Zn(OH)2 is 99.394 g/mol.

I hope you have understood the short and simple calculation for finding the molar mass of Zn(OH)2.

Remember

• In some books, you may see the unit of molar mass as grams/mole or g/mole. But all these units (i.e g/mol, grams/mole and g/mole) are the same. 
• Always follow the calculation order to avoid any mistakes in calculation. First solve the brackets, then multiplications and at last do the final addition.
• And don’t forget to put the unit g/mol to your final calculated molar mass.

Check out other related topics for more practice;
KH2PO4 Molar Mass
Na2O (Sodium oxide) Molar Mass
Diethyl ether [(C2H5)2O] Molar Mass
Ni(OH)2 Molar Mass
Uranium hexafluoride (UF6) Molar Mass