Write the formula for the molecule in the picture.

the equation for synthesis of water is as follows;

here two moles of hydrogen are used with one mole of oxygen which gives one molecule of water as a product. but shana misinterpreted 2 moles as 2 grams in this equation.

a redox reaction

explanation:

potassium metal is oxidized to potassium ion, and iodine is reduced to iodide ion, and we add (i) and (ii) together to eliminate the electrons.