Question

1. main idea explain why evaporation of water is a physical change and not a chemical change.
2. identify four physical properties that describe a liquid. identify a chemical property.
3. explain how the law of conservation of mass applies to chemical changes.
4. think critically does the law of conservation of mass apply to physical changes? how could you test this for melting ice? for the distillation of water?
5. calculate bismuth and fluorine react to form bismuth fluoride. if 417.96 g of bismuth reacts completely with 113.99 g of fluorine, how many grams of bismuth fluoride are formed?

Explanation:

Step1: Recall law of conservation of mass

In a chemical reaction, the total mass of reactants equals the total mass of products.

Step2: Identify reactants and products

The reactants are bismuth and fluorine, and the product is bismuth fluoride.

Step3: Calculate mass of bismuth fluoride

According to the law of conservation of mass, the mass of bismuth fluoride formed is the sum of the masses of bismuth and fluorine that react. Given mass of bismuth = 417.96 g and mass of fluorine = 113.99 g. So mass of bismuth fluoride = 417.96 g+ 113.99 g = 531.95 g.

Answer:

531.95 g