Why does sublimation feel cold?

Find pH for lemon juice pH = - log[0.00500]

The volume of oxygen gas changed from 10 ml to 11 ml as the temperature changed. is this a chemical change or a physcial change

Elements in the first column of the periodic table belong to the alkali family. Name the alkali metals.

What type of reaction is Cl2+Al

In the equation: MgCl2 + Na3P - -> write the chemical formula for the compound that will be formed that contains Mg

Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true? A) A physical change has occurred, with energy is being absorbed.

Explain what happens to water when heat energy is absorbed a. Ice melts b. Liquid water freezes c. Water vapor condenses

Will fluorine form an anion or a cation? Why?

An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has 1). More protons than neutrons 2). More neutrons than protons. 3) a total of 2 valence electrons. 4).

When bases dissolve in water they release what type of negative ion?