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.

A 92.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 46.0 ml of koh at 25 ∘c.

A 0.286-g sample of gas occupies 125 ml at 60. cm of hg and 25° c. what is the molar mass of the gas?

In a methane molecule (ch4), there are 4 single covalent bonds. in an octane molecule (c8h18), there are 25 single covalent bonds.

A negative change in free energy, or - ΔG, represents a spontaneous reaction. TRUE FALSE

The organic compounds that are structural elements in the cell walls of plants and bacteria are known as

What are facts on osmosis?

If a map of temperature displayed stripes parallel to the equator with equal temperatures at equivalent distances north and south of the equator, it would mean that only blank affected temperature.

What is the term for the amount of salts in water? Evaporation Evaporation Salinity Thermocline Density

In an acid-base titration, of 20 ml of a m HCI solution with 1 m NaOH. How many ml of NaOH are needed

Which of the following is not a source of air pollution related to human activities