chemistry limiting reagent

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?  

P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4

• 1:3

• 3:1

• 3:2

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol

• 1.0 mol

• 10.1 mol

• 4.5 mol

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

How many moles are in 19.82 g Mg? 

• 1.226mol Mg

• 481.7mol Mg

• 1.000mol Mg

•  0.815 mol Mg

How many grams of H₂O will react with 4.5 moles of CO₂?
CO₂  +  H₂O  -->  H₂CO₃

• 0.25 g

• 4.00 g

• 81.09 g 

• 15.9 g

When 12 moles of O₂ reacts with 1.1 mole of C₁₀H₈ what is the limiting reactant if we look at how much H₂O if formed?

C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

• 
  CH₄

• H₂O

• CO₂

• O₂

If 15.0 g of silver nitrate dissolved in 1L of water, reacts with 20.0 g of sodium chloride dissolved in 1L of water, identify the limiting reagent and the number of moles of that excess reagent consumed.

• silver nitrate is the limiting reagent and 0.05068 mol are consumed

• silver nitrate is the limiting reagent and 0.29156 mol are consumed

• sodium chloride is the limiting reagent and 0.342 mol are consumed

• sodium chloride is the limiting reagent and 0.342 mol are consumed

  0.29156 mol are consumed

CH_4​+2O₂​→CO₂​+2H₂​O

How many grams of CO₂ will be produced from 15.0 g of CH₄ and 114 g of O₂?

• 20.58

• 39.19

• 78.38

• 41.15g

CH_{4 (g) ​}+2O_{2 (g)} ​→CO₂​ _(g) +2H₂​O _(g)

What is the volume of CO₂ that will be produced from 15.0 g of CH₄ and 114 g of O₂ at 25 ^oC?

• 66.78L

• 21.23L

• 23.18L

• 88.31L