1. The element Neon (Ne) consists of three isotopes with atomic masses as follows: 19.99 amu, 20.99 amu, and 21.99 amu. The relative abundances of these three
isotopes are 90.92%, 0.25%, and 8.83%, respectively. From this data, calculate
the average atomic mass of Neon.

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.