During an experiment, a student observes the formation of a precipitate. Why does this indicate that a chemical reaction is likely occurring? A solid forms, and there is a change of color.
A gas forms, and there is a change of color.
A solid forms, and light is emitted.
A gas forms, and light is emitted.

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves