Chemical Formulas
What is the chemical formula for water?
H2O
Define Molar Mass
The mass of one mole of a substance (in g/mol).
How many atoms are in one mole of any element?
6.022 x 10 to the 23 atoms
What is Avogadro‘s number?
6.022 x 10 to the 23 particles/mole
What is the kinetic theory of matter?
Molecules and atoms are in constant motion. The higher the temperature, the greater their speed.
What is the chemical formula for carbon dioxide?
CO2
Find the Molar Mass of H2.
2.02 g/mol
One mole of oxygen gas (Oâ‚‚) contains how many molecules?
6.022 x 10 to the 23 molecules
Who is Avogardo and what did he discover about gasses?
He discovered that equal volumes of gases contain equal numbers of molecules.
What are the 3 phases of matter?
Solid, liquid, gas
What is the chemical formula for chloride?
AICl3
Find the Molar Mass of CO2
44.01 g/mol
What is the relationship between moles, mass, and molar mass?
Moles = Mass / Molar Mass
How many atoms is in 2 moles of copper?
1.02 x 10 to the 24 atoms.
What is the formula for density?
Density decreases
What is the chemical formula for nitrate?
Ca(NO3)2
Find the Molar Mass of Ca(OH)2
74.09 g/mol
How many moles are in 18 grams of water (H2O)?
1.0 moles
If you have 3.01 X 10 to the 23 molecules of H2O, how many moles do you have?
0.5 moles
A metal sample has a density of 7.8 g/mL and a volume of 10 mL. What is its mass?
What is the chemical formula for sulfate?
(NH4)2SO4
Find the Molar Mass of (NH4)2SO4
132.19 g/mol
How many moles of CO2 are in 2.64X10 to the 24 molecules?
4.38 moles
How many atoms of hydrogen are in 2 moles of water?
2 moles X 6.022 X 10 to the 23 molecules/mole X 2 H = 2.41 X 10 tot he 24 atoms H
A liquid has a mass of 15 g and a density of 1.5 g/mL. What is its volume?
10 mL