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1 mole = particles

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1 mole = particles

: Avogadro’s number

Particles = molecules

Molar mass of each element can be found on the periodic table. The unit is in grams/mol or g/mol.

Calculate the molar mass of mercury (II) sulfate.

p.326. #31, A sample of sodium sulfite (Na2SO3) has a mass of 2.25 g. (a) How many Na+ ions are present? (b) How many SO3-2 ions are present? (c ) What is the mass in grams of one formula unit of Na2SO3?

- #33, A sample of ethanol (C2H5OH) has a mass of 45.6 g. (a) How many hydrogen atoms does the sample contain?

- Which has the larger percent by mass of sulfur, H2SO3 or H2S2O8?
- Percent formula =

- Empirical formula is the __________ ratio of elements in a compound.
- Ionic compound: Is the empirical formula the correct formula? (please do not answer and let the rest of the class some time to think)
- Molecular compound: is the empirical compound the correct formula?
- The relationship of molecular formula and empirical formula

- Determine the molecular formula for ibuprofen. Analysis of ibuprofen yields a molar mass of 206 g/mol and a percent composition of 75.7% C, 8.80% H and 15.5% O.

- Combustion reaction: combustion, burns
- You need hydrocarbon O2
- The process produces CO2 and H2O, both in __________ state
- Write the balanced equation of the combustion of liquid C6H13OH

- Synthesis: synthesis, combination, composition
- Simple → complex or elements → compound
- Write the balanced synthesis equation of magnesium bromide

- Decomposition: decomposition
- Complex → simple or compound → elements
- Write the balanced decomposition equation of magnesium bromide.

- Single Replacement Reaction
- Metal(A) + Ionic solution → Ionic solution + Metal(B)
- Write the balanced equation of nickel added to the solution of magnesium chloride.

- Double Replacement
- Solution + solution → cations change partners (thoughts: can a cation change partner with an anion?)
- Write the balanced equation of adding the solution of sodium phosphate into the solution of manganese (II) chloride.
- Write complete ionic equation.
- Write net ionic equation.

- Dissociation equation:
- Solid ionic compound is put into water. Ionic compound will dissociate into cations and anions.
- Write the balanced equation of when calcium iodide is put into water.