Which identifies that a chemical reaction has occurred?

A. New substances are produced.

B. The color has changed.

C. Bubbles have formed.

D. Temperature has changed.

Yogurt has an approximate pH of 5 and vinegar has an approximate pH of 3. How many times more acidic is vinegar compared to yogurt in terms of concentration?

How many valence electrons are available for bonding in silicon

A solution of ammonia had a pH of 11.8. What is the concentration of OH ions in the solution?

Members of which group easily lose an electron to form a + 1 cation?

Each particle contained in hydrogen gas is made up of two identical hydrogen atoms chemically joined together. hydrogen gas is

An electron moved from a higher energy level to a lower energy level. What most likely happened during the transition?

As the average kinetic energy of the particles in a gas increases, which of the following occurs? The temperature of the gas increases. The temperature of the gas decreases. The number of particles increases. The number of particles decreases.

What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?

0.100 mol of CaCO3 and 0.100 mol CaO are placed in an 10.0 L evacuated container and heated to 385 K. When equilibrium is reached the pressure of CO2 is 0.220 atm. 0.

What is true about the charges of transition metal ions?