Sodium sulfate and barium chloride react with each other to form sodium chloride and barium sulfate as shown. 1
3
Reactants
Products
Sodium
Sulfate
Solution
Barium
Chloride
Solution
Sodium
Chloride
Barium
Sulfate
Which statement MOST accurately describes the mass of the reactants compared to the mass of the products?
O A. The mass of the reactants is the same as the mass of the products.
OB. The products have a greater mass because matter was created during the reaction.
C The reactants have a greater mass because some of the mass was converted to heat.
D. The reactants have a greater mass because some matter was destroyed by the reaction.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.