What is the number 6.0221367x10^23, which is the number of representative particles in a mole, and can be rounded to 3 significant digits 6.02x10^23 called?
100
The inverse molar mass
When converting mass to moles, what conversion factor do you use?
100
5.93g
What is the mass of 4.35x10^-2 mol of zinc chloride(ZnCl2)?
100
CH2
When 1.00g of a compound containing only carbon and hydrogen is burned completely, 3.14 of CO2 and 1.29g of H2O is produced. What is the empirical formula?
100
sodium sulfate decahydrate
What is the name of this chemical formula?
Na2 SO4 x 10H20
200
0.595mol ZnCl2 a formula unit;Particles to Moles
State the conversion and solve the problem.
3.58x10^23ZnCl2
200
Molar Mass
The mass in grams of one mole of any pure substance
200
the number and types of atoms contained
What do chemical formulas indicate in one unit of the compound?
200
3.08%H, 31.61%P, 65.31%O
What is the percent composition of phosphoric acid(H3PO4)?
200
a. the formula of a hydrate
b. the compound name and the word hydrate with a prefix indicating the number of water molecules in 1 mol of the compound
What consists of the formula of the ionic compound and the number of water molecules associated with 1 formula unit?
What does the name of a hydrate consist of?
300
Mole
What is the SI base unit used to measure the amount of a substance?
300
number of moles x mass in grams/l mole=mass
What is the formula for converting moles to mass?
300
0.0403mol
Mass of a compound to moles.
6.50g ZnSO4
300
Percent Composition
What is the percent by mass of each element in a compound?
300
NaC2H3O2 x 3H2O
What is the chemical formula?
sodium acetate trihydrate
400
6.02x10^24;Moles to particles
State the conversion and solve the problem.
Calculate the number of oxygen atoms in 5.0 mol of oxygen molecules. Oxygen is a diatomic molecule,O2.
400
1.20x10^3g Si
Solve.Moles to mass.
42.6 mol Si
400
The law of conservation of mass
What does the molar mass of a compound demonstrates?
400
C6H6, the formula for benzene
A compound with an empirical formula of CH has a molecular weight of 78g/mol. What is the molecular formula?
400
Anhydrous Compounds
What are formed when hydrates are heated?
500
6.02x10^23
How is this number written when rounded to 3 significant digits: 602,213,670,000,000,000,000,000?
500
a. 4.79x10^24 atoms Li
b. 3.45x10^22 atoms Hg
Solve. Mass to Atoms.
a. 55.2g Li
b. 11.5g Hg
500
1.42x10^24 O atoms
A sample of carbon dioxide (CO2) has a mass of 52.0g. How many oxygen atoms are present?
500
percent by mass=mass of element in 1mol of compound/molar mass of compound x 100
What is the formula used to find the percent by mass from the chemical formula?
500
Hydrate
What is a compound that has a specific number of water molecules bound to its atom?