CHEM EXAM CH 1. Important Info

Avogadros Number

Solution =

soulte + solvent mixture

EX: of solution

NaCl

Know trends for ionic charge

rules for counting sig figs

rules for calculating with sig figs

Definiton equations for density

density= mass/volume g/ml or g/cm³ g/L

defintion equation for molarity

moles of solute(M)/Liters of solution mo/L

What term relates density and molarity?

molar mass g/mol

Element name and symbol

Molybdenum - Mo

Density( Units and conditions of your element)

10.223 g/cm³ → conditions at 20 degrees Celsius or 293.15 K

Melting/freezing point of element(unit)

2623 degrees Celsius ( 4753 degrees F, 2896 K)

Provide brief description of history, properties, and uses of your assigned element

Discovered in 1778 by Carl Wilhem Scheele. Molybdenum is a silvery-white, hard transition metal. Because of its extremely high melting point and strength at high temperatures it's used in steel alloys, industrial catalysts, electrical contacts, and aerospace applications. Mo is pretty cool!