Adding 50 grams of gelatin and 400 grams of water will give us a mixture with a total mass of 450 grams. The percent mass of water is calculated by dividing the mass of water by the total mass and multiply by 100. mass % = (400 / 450) x 100% = 88.89% Thus, there is approximately 88.90% of water in the sample.
A chemical change is a change in the chemical makeup of a substance and results in a new substance. Ice and water both have the same chemical makeup - ice is just a different state and has the same atoms but in an expanded form.
