What are 4 indicators that a chemical reaction has occurred?

Describe the silica tetrahedron

Which statement best describes how a compound is different from an element

How many moles of helium are in 16 g of the element

Al combinarse los átomos de potasio (un metal alcalino) con los átomos de bromo (un no metal del grupo de los halogenos), lo mas probable es que entre ellos se establezca: 1. Enlace covalente. 2. Enlace metálico. 3. Enlace por puentes de hidrógeno.

A buffering solution is made from acetic acid (CH3CO2H) and its conjugate base (CH3CO2-). Which reaction describes the buffering effect of the solution when an acid is added to the solution? a. CH3CO2H (aq) + OH (aq) → CH3CO2 - (aq) + H2O (l) b.

The times in the past when continental glaciers covered large parts of Earth's land surface were the What?

How many electrons are contained in an ion formed from an atom of na?

Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium? 1.) oxygen + lithium oxide to lithium 2.) lithium + oxygen to lithium oxide 3.) oxygen + lithium to lithium + oxide 4.

Describe the attractive forces and repulsive forces that exist between two atoms as the atoms move closer together

An object in motion will cause which of the following?