There must be a '2' before
Remember that the coefficients must be written such that the number of elements on each side is equal. Refer to the law of conservation of mass for more information.
The other error is that 112g cannot turn into 100g as it does not obey the law of conservation of mass. It states that the mass of the products must be equal to the mass of the reactants and by having 12 grams disappear makes it wrong as it doesn't follow the laws of conservation of mass.