HNO3+HI->NO+I2+H20

The given chemical equation represents a reaction between nitric acid (HNO3) and hydrogen iodide (HI), forming nitric oxide (NO), iodine (I2), and water (H2O) as products. To understand this reaction, it's helpful to know the concept of chemical equations.

A chemical equation is a symbolic representation of a chemical reaction. It describes the reactants, products, and their respective quantities. The reactants are written on the left side of the equation, separated by a plus sign (+), and the products are written on the right side.

To balance this chemical equation, you need to ensure that the number of atoms of each element is the same on both sides. Let's step through the process of balancing this equation.

Balancing the equation:
1. Start with the most complex molecule, in this case, nitric acid (HNO3). It contains one nitrogen atom, so we need one molecule of NO for nitrogen.
HNO3 + HI -> NO + ...

2. Next, balance the iodine atoms. There is one iodine atom on the right side, so we need one molecule of I2.
HNO3 + HI -> NO + I2

3. Now, balance the hydrogen atoms. On the left side, there are four hydrogen atoms (one from HNO3 and three from HI). So, we need four molecules of H2O on the right side to balance the hydrogen.
HNO3 + HI -> NO + I2 + 4H2O

4. Finally, balance the oxygen atoms. On the left side, there are three oxygen atoms (from HNO3). To balance them on the right side, we need three oxygen atoms from water (H2O).
HNO3 + HI -> NO + I2 + 4H2O

The balanced chemical equation becomes:
HNO3 + HI -> NO + I2 + 4H2O

Now you have successfully balanced the equation.

Please note that this explanation assumes that you are looking for a balanced equation. If you have any other specific question or need further assistance, feel free to ask.