Question

1. in a chemical reaction occurring in a beaker, the beaker and its contents are considered the surroundings.

a) true b) false

1. if we are studying the reaction between hydrochloric acid and zinc in a test tube, the hydrochloric acid and zinc are considered the:

a) surroundings b) system c) universe d) macroscopic property

1. macroscopic properties are those that can be observed and measured without the aid of a microscope.

a) true b) false

1. which of the following is an example of a macroscopic property of a liquid?

a) the speed of individual molecules b) the mass of the liquid c) the arrangement of individual atoms d) the vibrations of particles

Explanation:

1. In a chemical - reaction context, the system is what we focus on (the reactants and products), and the beaker and its contents are the surroundings.
2. The substances undergoing the reaction (hydrochloric acid and zinc) are the system we are studying.
3. By definition, macroscopic properties are observable and measurable without a microscope.
4. The mass of a liquid can be measured directly without a microscope, while the speed of individual molecules, arrangement of individual atoms, and vibrations of particles are microscopic aspects.

Answer:

1. a) True
2. b) System
3. a) True
4. b) The mass of the liquid