Bellwork 8 4th Six Weeks

CuCl₂ + 2NaNO₃ --> Cu(NO₃)₂ + 2NaCl

If 15.0 grams of CuCl₂ react with 20 g of NaNO₃, how much NaCl can be formed?

• 13.0 g of NaCl

• 98 g of NaCl

• 26 g of NaCl

• 17.4 of NaCl

The limiting reactant

• slows the reaction down
• is used up first
• is the reactant that is left over
• controls the speed of the reaction

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, how many moles of AlCl₃ can produced? Identify the limiting reactant.

• AlCl₃

• Cl₂

• Al

When does a chemical reaction stop?

• When the lab is finished
• When the excess reactant is used up
• When the limiting reactant is used up
• Chemical reactions never stop

Tags

NGSS.HS-PS1-6

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO find moles of N₂ to determine your answer.

4NH₃+6NO --> 5N₂ + 6H₂O

• NH₃

• NO

• N₂

• water

The branch of chemistry that deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions.

• stoichiometry

• chemistry

• organic chemistry

• qualitative chemistry

Tags

NGSS.HS-PS1-7

Coefficients in a balance chemical equation represents the

• masses of reactants

• number of moles of reactants

• number of atoms in each compound

• number of valance electrons

Tags

NGSS.HS-PS1-7

limiting reactant

• the amount of product actually produced

• the amount of product calculated for a reaction

• reactant which determines the amount of product produced

• reactant which is in excess in a reaction

Tags

NGSS.HS-PS1-7

mole ratio can be used to calculate the

• amount of energy

• speed of reaction

• mass of products from a known amount of reactants

• number of atoms

Tags

NGSS.HS-PS1-7

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Fe₂O₃ to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe₂O₃/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7