2. When do chemical reactions happen?

O

When matter changes states

O

When water freezes into ice

O

When atoms gain, lose, or share electrons

O

When water boils

What is the oxidation number of manganese in the permanganate ion (mno4 - ) ? a. 3 b. 2 c. 7 d. 2-

Some elements are solids at room temperature true or false

What makes an article a primary source

What is the ionic composition and osmolarity of "physiological saline" - the intravenous fluid drip you receive at a hospital?

In the pie chart below, which of the following represents the amount of Earth's water located in the oceans? A pie chart with part A representing 2%, part B representing. 8%, part C representing. 2% and part D representing 97%.

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.

A chemist must prepare of aqueous potassium permanganate working solution. He'll do this by pouring out some aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water.

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds.

What Word means the gradual change and build up of organisms in an enviroment

If you see the Sun is high in the sky, what can you say about the SUN as viewed from the opposite side of Earth at the same moment?