Balancing Chemical Equations — Unit test Answers

Sari is studying four different samples of materials. This table shows the mass and volume of the samples.

Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?

The descriptions below explain two ways that water is used by plants on a sunny day.I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves.II. Plants use some of this water in leaves in a process called photosynthesis. During photosynthesis, water and carbon dioxide break apart and recombine to form two new substances, oxygen and glucose.

Tijuan mixed a solid and a liquid together in a beaker. He determined that a chemical change occurred.

Which describes a feature of the physical changes of all substances?