stoichiometry: mole to mole and mole to mass conversion

The coefficients in a chemical equation represent the ______

• number of atoms in each compound in a reaction
• relative numbers of moles of reactants and products
• masses, in grams, of all reactants and products
• number of valence electrons involved in the reaction

Tags

NGSS.HS-PS1-7

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation
• Panic
• Write an Unbalanced Equation
• Ask for help

Tags

NGSS.HS-PS1-7

Calculate the molar mass of Mg(OH)_2.(Mg= 24g, O=16g and H=1.01g)

show your work in paper.

• 33.2 g/mol
• 41.3 g/mol
• 86.9 g/mol
• 58.02 g/mol

For the Balanced Reaction: ___Mg + 1 Fe₂O₃ → ___MgO + 2 Fe;

What is the Ratio of moles of MgO to moles Fe? show your work in paper

• 3mol Mg / 2 mol Fe

• 2 mol Mg/ 3 mol Fe

• 1 mol Fe/ 2 mol Fe

• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7

From the Balanced Reaction:

__Mg + 1 Fe₂O₃ → 3 MgO + __Fe

Calculate how many moles of Fe produced in 4.00moles of Mg. Show your complete work on a paper)

• 6moles

• 2.50moles

• 2.67moles

• 8moles

Tags

NGSS.HS-PS1-7

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)

12.00 moles of NaClO₃ will produce how many grams of O₂? (O= 16.00g) _{Show your work on a paper.}

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

Tags

NGSS.HS-PS1-7

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂

How many moles of H₂ would be formed if 250g H₂SO₄ completely reacted with aluminum? (H=1.01g, S=32g, O=16g) Show your complete work on a paper.

• 7.65mol

• 2.55mol

• 7.50mol

• 25.5mol

Tags

NGSS.HS-PS1-7

Show your complete work on a paper.

• 15 mol Fe

• 30mol Fe

• 35mol Fe

• 40mole Fe

Tags

NGSS.HS-PS1-7

Show your complete work on a paper.

• 450.g Mg

• 415. g Mg

• 455.63g Mg

• 425.45g Mg

Tags

NGSS.HS-PS1-7

Show your complete work on a paper.

• 1.10 mole H2

• .55mole H2

• 55mole H2

• 110 mole H2

Tags

NGSS.HS-PS1-7