CHOCOLATE CHIP OREO BROWNIE BARS
Chocolate Chip Oreo Brownie Bars
The pure substances are baking soda (NaHCO3), sugar (C12H22011) and salt (NaCI). The ones that are homogeneous mixtures are all purpose flour, butter, and vanilla extract. And when it is all mixed together, it is also a homogeneous mixture. The heterogeneous mixtures would be the eggs, the batter before being mixed together, and the chocolate chip brownie bars after being baked. Physical changes would be the butter being softened and the batter being made into bars. Proof of chemical changes would be the brownie bars becoming fuller and bigger, and the smell of them being baked. Submitted by: "Baily Weik"