Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   A sample of a hydrocarbon is found to contain 7.92 g of carbon and 0.665 g of hydrogen.  What is the empirical formula for this compound?

In lab, you observed and classified multiple reactions. You mix a clear blue solution and a clear yellow solution and observe the results to determine if a chemical reaction took place. Which of the following is NOT an indication that a chemical reaction took place?

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   Given the following equation: 2 HCl + CaCO3 → CaCl2 + H2O + CO2 How many grams of calcium chloride can be produced if you begin with 75 mL of 1.58 M HCl and [x] grams of calcium carbonate?

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   Ethanol (C3H6O) is a liquid at room temperature :  1 mole  =  6.02 x 1023 atoms             Density of  C3H6O =   0.815 g/mL How many moles of ethanol are present in [ml] mL of C3H6O?

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   Consider the following reaction. C3H8 + 5 O2 → 3 CO2 + 4 H2O Identify what main category of reaction it is. If possible, further categorize it into all other relevant types of reaction.

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   What volume of [a] M NaOH is needed to completely titrate [b] mL of [c] M phosphoric acid according to the equation: H3PO4(aq) + 3 NaOH(aq) → Na3PO4(aq) + 3 H2O(l)

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   Given the following equation: 2 HCl + CaCO3 → CaCl2 + H2O + CO2 How many grams of calcium chloride can be produced if you begin with [x] mL of 1.58 M HCl and 5.640 grams of calcium carbonate?

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   In the following oxidation-reduction reaction, what is being oxidized? C4H8 + 6 O2 → 4 CO2 + 4 H2O

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   C[x]H[y]O[z] is an organic compound.  Calculate its molar mass.

Periodic Table   Polyatomic Ions List   Conversion Factors   Solubility Rules   Consider a [x] * 1023 molecules sample of C[y]H[z].  How many moles of H atoms would be in the sample?