Molar mass stoichiometry
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Molar Mass & Stoichiometry. What is the Molar Mass of Mg(OH) 2 ?. 41.32 g/mole 42.33 g/mole 58.33 g/mole 827.03 g/mole Not listed. What is the Molar Mass of H 3 PO 4 ?. 47.98 g/mole 95.96 g/mole 98.00 g/mole 196.00 g/mole Not listed.

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Molar Mass & Stoichiometry

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Molar Mass & Stoichiometry


What is the Molar Mass of Mg(OH)2 ?

  • 41.32 g/mole

  • 42.33 g/mole

  • 58.33 g/mole

  • 827.03 g/mole

  • Not listed


What is the Molar Mass of H3PO4?

  • 47.98 g/mole

  • 95.96 g/mole

  • 98.00 g/mole

  • 196.00 g/mole

  • Not listed


Convert 125.25 g of Sulfur (S8) (MM = 256.56 g) to moles.

  • 0.48819 moles

  • 3.9055 moles

  • 4.4588 moles

  • 157.32 moles

  • 4016.8 moles

  • Not listed


Convert 3.75 moles of BaSO4 to grams.(MM = 233.4 g)

  • 875 g

  • 233.40 g

  • 62.2 g

  • 0.0161 g

  • Not listed


Convert 2.50 moles of KCl (MM = 74.55 g) to molecules.

  • 4.15 x 10-24molecules

  • 1.51 x 1024 molecules

  • 6.02 x 1023 molecules

  • 6.78 x 1025 molecules

  • Not listed


Convert 70.0 g of LiBr (MM = 86.84 g) to molecules.

  • 7.47 x 1023 molecules

  • 4.21 x 1025 molecules

  • 3.65 x 1027molecules

  • 4.85 x 1023molecules

  • Not listed


Stoichiometry Mole Ratios


Given the reaction2 PbS + 3 O2 2 PbO + 2 SO2239.27 32.00 223.20 64.07 g/mole

  • 261.6 grams

  • 116.3 grams

  • 174.4 grams

  • 223.2 grams

  • 186.9 grams

  • Not listed

25.00 g of O2 will yield how many grams of PbO?


Given the reaction4 Al + 3 O2 2 Al2O326.98 32.00101.96 g/mole

  • 920 grams

  • 6200 grams

  • 460 grams

  • 61 grams

  • 230 grams

  • Not listed

4.5 moles of Al will yield how many grams of Al2O3?


Given the reaction2 C6H14 + 19 O2 12 CO2 + 14 H2O86.20 32.00 44.01 18.02 g/mole

  • 5.9354 x 1026 molecules

  • 8.4792 x 1025 molecules

  • 1.2113 x 1025 molecules

  • 6.8856 x 1024 molecules

  • 2.8812 x 10-21 molecules

  • Not listed

140.85 grams of C6H14 will yield how many molecules of H2O?


Percent Composition,Empirical FormulasMolecular Formulas


What is the % mass of lead in PbO2?

  • 86.62%

  • 92.83%

  • 13.37%

  • 6.69%

  • 13.37%

  • Not listed


What is the % mass of Cu in Cu2S?

  • 66.46%

  • 39.93%

  • 79.85%

  • 20.14%

  • 33.54%

  • Not listed


What is the % mass of nitrogen in Ba(NO3)2?

  • 5.36%

  • 10.72%

  • 16.08%

  • 47.45%

  • 23.73%

  • Not listed


What is the mass of oxygen in 54 g of H2O.

  • 47.94 g

  • 16.00 g

  • 6.05 g

  • 3.02 g

  • Not listed


A compound is found to contain 53.70% iron and 46.30% sulfur. What is the empirical formula of this compound?

  • FeS

  • FeS2

  • Fe2S3

  • Fe3S2

  • Not listed


A compound contains 4.04 g of N and 11.46 g of O. What is the compound’s empirical formula?

  • NO

  • N2O7

  • N5 O2

  • N2O5

  • Not listed


The molar mass of a compound is 283.89 g/mol. If the empirical formula is P2 O5, what is its molecular formula?

  • P4 O10

  • P4 O5

  • P10O50

  • P2O5

  • Not listed


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