Stoichiometry Review

The calculations of quantities in chemical reactions is called

• Reactivity

• Stoichiometry

• Thermochemistry

• Mechanics

Given the chemical equation 2Fe + 3Cl₂ --> 2FeCl₃ , how many moles of chlorine gas will be required to react with sufficient iron to produce 14 moles of iron (III) chloride?

• 42 mol

• 3 mol

• 21 mol

• 6 mol

Tags

NGSS.HS-PS1-7

Given the equation 2CO + O₂ --> 2CO₂ , how many moles of CO are needed to react with 4.8 grams of O₂ gas to produce CO₂?

• 4 mol

• 0.52 mol

• 128 mol

• 0.3 mol

Tags

NGSS.HS-PS1-7

What mass of ammonia, NH3, is necessary to react with 2.1 moles of oxygen, given 4NH₃ + 7O₂ --> 6H₂O + 4NO₂?

• 4.46 g

• 20.4 g

• 143 g

• 9.71 g

Tags

NGSS.HS-PS1-7

The amount of product formed when a reaction is carried out in the laboratory is called?  

• actual yield

• theoretical yield

• excess yield

• limiting yield

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7

The substance completely used up in a chemical reaction is called?

• excess reactant

• theoretical reactant

• limiting reactant

• actual reactant

Tags

NGSS.HS-PS1-7

In a chemical reaction, the mass of the products:

• equals the mass of reactants

• is greater than the reactants

• is less than the reactants

• has no relationship with reactants

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NGSS.HS-PS1-7

Given 2H₂ + O₂ --> 2H₂O. How many moles of oxygen are required to react completely with 1.2 grams of hydrogen to form water?

• 4 mol

• 1.2 mol

• 0.5 mol

• 0.3 mol

How many moles of NO2 are produced when 2.35 moles of N2_O4 are decomposed according to the equation: N₂O₄ --> 2NO₂?

• 2.35 mol

• 1.125 mol

• 4.7 mol

• 0.5 mol

Tags

NGSS.HS-PS1-7

How many moles of CaO are produced when 68.0 g of CaCO₃ is heated according to the equation: CaCO₃ --> CaO + CO₂?

• 0.68 mol

• 0.89 mol

• 38 mol

• 68.1 mol

Tags

NGSS.HS-PS1-7