When determining an element's identity, what is the most important subatomic part to examine?

A) electrons

B) neutrons

C) valence electrons

D) protons

What is the steam being given off when water boils?

Nitrogen gas and hydrogen gas react to form ammonia according to the following thermochemical equation. 3H2+N2⟶2NH3ΔH=-96kJ Write the balanced chemical equation for a reaction involving these substances with the following change in enthalpy.

How to calculate the energy absorbed by ice melting

Polymers are formed by joining several units called monomers. What does the term monomer refer to? A) A unit made up of several compounds. B) A unit made up of several atoms. C) A unit made up of several molecules.

Which is an example of a chemical change? a. the separation of a mixture into its components b. the separation of a compound into its elements c. the separation of gases from liquids d.

Which type of reaction occurs in the following? 2HgO (s) - - 2Hg (l) + O2 (g) 1. a decomposition reaction in which a metal is reduced 2. an acid-base neutralization reaction to produce oxygen gas a displacement 3.

Is pulverizing an aspirin a physical or chemical process

Explain two reasons why we can conclude that the rise of the water in the glass tube is due to root pressure and not transpiration or capillarity

Four type of molecular models

How many particles are in 1 mol of carbon? 1 mol of lithium? 1 mol of eggs? will 1 mol of each of these substances have the same mass?