Molar Mass & Stoichiometry. What is the Molar Mass of Mg(OH) 2 ? 1. 41.32 g/mole 2. 42.33 g/mole 3. 58.33 g/mole 4. 827.03 g/mole 5. Not listed 1234567891011121314151617181920.

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Presentation transcript:

Molar Mass & Stoichiometry

What is the Molar Mass of Mg(OH) 2 ? g/mole g/mole g/mole g/mole 5. Not listed

What is the Molar Mass of H 3 PO 4 ? g/mole g/mole g/mole g/mole 5. Not listed

Convert g of Sulfur (S 8 ) (MM = g) to moles moles moles moles moles moles 6. Not listed

Convert 3.75 moles of BaSO 4 to grams. (MM = g) g g g g 5. Not listed

Convert 2.50 moles of KCl (MM = g) to molecules x molecules x molecules x molecules x molecules 5. Not listed

Convert 70.0 g of LiBr (MM = g) to molecules x molecules x molecules x molecules x molecules 5. Not listed

Stoichiometry Mole Ratios

Given the reaction 2 PbS + 3 O 2  2 PbO + 2 SO g/mole g of O 2 will yield how many grams of PbO? grams grams grams grams grams 6. Not listed

Given the reaction 4 Al + 3 O 2  2 Al 2 O g/mole 4.5 moles of Al will yield how many grams of Al 2 O 3 ? grams grams grams grams grams 6. Not listed

Given the reaction 2 C 6 H O 2  12 CO H 2 O g/mole grams of C 6 H 14 will yield how many molecules of H 2 O? x molecules x molecules x molecules x molecules x molecules 6. Not listed

Percent Composition, Empirical Formulas Molecular Formulas

What is the % mass of lead in PbO 2 ? % % % % % 6. Not listed

What is the % mass of Cu in Cu 2 S? % % % % % 6. Not listed

What is the % mass of nitrogen in Ba(NO 3 ) 2 ? % % % % % 6. Not listed

What is the mass of oxygen in 54 g of H 2 O g g g g 5. Not listed

A compound is found to contain 53.70% iron and 46.30% sulfur. What is the empirical formula of this compound? 1. FeS 2. FeS 2 3. Fe 2 S 3 4. Fe 3 S 2 5. Not listed

A compound contains 4.04 g of N and g of O. What is the compound’s empirical formula? 1. NO 2. N 2 O 7 3. N 5 O 2 4. N 2 O 5 5. Not listed

The molar mass of a compound is g/mol. If the empirical formula is P 2 O 5, what is its molecular formula? 1. P 4 O P 4 O 5 3. P 10 O P 2 O 5 5. Not listed