Molar Mass
What is the molar mass of Lithium
6.94 G
Name the compound SrO
Strontium oxide
How do you find empirical formula?
Find number of moles of each element, divide by the smallest number of moles and round to the nearest whole number. Add the subscripts to the elements.
How much does a mole weigh
It depends on the item/compound
Components EVENLY distributed in a mixture
Homogeneous mixture
What is the molar mass mercury
200.59 G
Name the compound NH4Cl
Ammonium Chloride
What is the empirical formula when the substance is made of 82 g of N and 18 g of H?
NH3
How many atoms are present in 325g of sulfur
6.10 X 10^24
Cannot be broken down any further and hold properties.
Element
What is the molar mass of lithium iodide
133.84 G
Name the compound SO3
Sulfur trioxide
A compound contains 49.99% Carbon, 5.61% hydrogen and 44.40% oxygen. What is empirical formula.
C2H2O
How many atoms are present in 13.2g of beryllium sulfide.
1.93 X 10^23
Example of an intensive property.
Color/boiling point/melting point/density
What is the molar mass of Triphosphorous pentoxide
172.91 G
11.2 Hydrogen and 88.8 oxygen
What is the empirical formula for a substance with 52.1% C, 13.2% H, and 34.8% O
C2H6O
How many grams are present in 2.81x10^25 F.U. of NaCl
2730.6 g
What is the density of an object that has a mass of 12.7 g and when placed into 125 mL of water changed the volume to 155 mL?
D = .42 g/mL
What is the molar mass of Manganese (VI) Hydroxide
157.00 G
Find the percent composition of Ca3(PO4)2
38.8 Ca, 20.0 P, 41.2 O
What is the empirical formula for a substance with 40.2% C, 6.7% H, and 53.4% O?
CH2O
How many moles are present in 9.98x10^31 formula units of barium sulfate.
1.66 X 10^8
Name and explain one physical separation technique.
filtration/centrifuge/magnetism/distillation/chromatography