Question

What are chemical formula's for
a) Magnesium chloride
b) Hydrogen sulphide

Answer 1

Answer:

(a) MgCl2

(b) H2S

Thank you

Answer 2

Explanation:

Chemical formula: Chemical formula is a formula which helps to represent a specific compound

Answer:

• Chemical Formula of Magnesium Chloride - MgCl2
• Chemical Formula of Hydrogen Sulphide - H2S

How do we know this?

We Follow a specific criteria to write a chemical formulae.

For Example Lets take Magnesium Chloride

We know that in Magnesium Chloride we have Magnesium and Chlorine. We also know that Magnesium is written as Mg and Chlorine is written as Cl.

Now Lets see the charge on both the ions, Magnesium has a +2 charge and  Chlorine as a -1 Charge.

While writing the formula we write the symbol and criss-cross the charges.

So in this case, After using Criss-Cross we get the formula as: MgCl2

The Same can be applied for Hydrogen Sulphide.

H has +1 charge and S has -2, After criss-cross method we get the formula as: H2S (We don't write +1 or -1 Charge)