Using the law of conservation of matter, determine the number of grams of iron sulfide (fes) that will be produced in this reaction 112g fe + 64g s → g fes. a. 48 grams b. 64 grams c. 112 grams d. 176 grams

In the Law of Conservation of Matter, the mass in should be equal to the mass out. So, for the reaction, 

112g Fe + 64g S → g FeS

Mass in is equal to 112 g plus 64 g which is 176 g. Therefore, the correct answer among the choices is option D.

Rethink and reinvent

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water