What can be observed about a substance that does not change the identity of that substance

At STP, which sample contains the same number of molecules as 3.0 liters of hydrogen gas?

What happens in an acid-base reaction according to the arrthenius defintion?

Which statements correctly describe water boiling in a pot? Air bubbles from the atmosphere are being absorbed. The water's internal kinetic energy is increasing. The water is gaining internal potential energy. The water's temperature is increasing.

Which factor distinguished Uranus from all other planets? A. Its length of day is different than that of earth. B. Its axis of rotation is tipped on its side. C. It has poles and equators. D. It is a gas giant.

What is on the left side of the periodic table that is a non metal

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.