PS.5.1.1 (5.P.2.2) #7: Schoolnet

Front

What is the principle of conservation of mass in a chemical reaction?

Back

The principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.

Front

How do you calculate the total mass of a mixture?

Back

To calculate the total mass of a mixture, simply add the masses of all components together, as mass is conserved.

Front

What happens to the mass of water when it freezes?

Back

The mass of the water remains the same when it freezes; it simply changes from liquid to solid form.

Front

What is the mass of a mixture if 50 grams of salt is added to 500 grams of water?

Back

The total mass of the mixture is 550 grams, as mass is conserved.

Front

How does evaporation affect the mass of a closed system?

Back

In a closed system, evaporation does not change the total mass; the water vapor condenses back into liquid form.

Front

What is the weight of a mixture if 1 oz of baking soda is combined with 2 oz of vinegar?

Back

The weight of the mixture is 3 oz, as the total mass is the sum of the individual masses.

Front

If a soil sample weighs 100 grams and is separated into components, how do you find the weight of the remaining component?

Back

To find the weight of the remaining component, subtract the weights of the known components from the total weight of the sample.

Front

What is the significance of using airtight containers in experiments involving water?

Back

Airtight containers prevent the loss of mass due to evaporation, allowing for accurate measurements of mass before and after changes.

Front

What is the relationship between mass and volume in mixtures?

Back

In mixtures, the total mass is the sum of the individual masses, while the total volume may vary depending on the properties of the components.

Front

How does the mass of ice compare to the mass of water it was formed from?

Back

The mass of the ice is equal to the mass of the water it was formed from, demonstrating the conservation of mass.