Answer:
a) The theoretical yield is 408.45g of 
b) Percent yield = 
Explanation:
1. First determine the numer of moles of
and
.
Molarity is expressed as:
M=
- For the 
M=
Therefore there are 1.75 moles of 
- For the 
M=
}{1Lsolution}[/tex]
Therefore there are 2.0 moles of 
2. Write the balanced chemical equation for the synthesis of the barium white pigment,
:

3. Determine the limiting reagent.
To determine the limiting reagent divide the number of moles by the stoichiometric coefficient of each compound:
- For the
:

- For the
:

As the
is the smalles quantity, this is the limiting reagent.
4. Calculate the mass in grams of the barium white pigment produced from the limiting reagent.

5. The percent yield for your synthesis of the barium white pigment will be calculated using the following equation:
Percent yield = 
Percent yield = 
The real yield is the quantity of barium white pigment you obtained in the laboratory.
Two hydrogen and two oxygen multiply for two
18 moles of water are produced in the above reaction.
Hope this helps you!
Answer:
The answer to your question is 4
Explanation:
Chemical reaction
C₂H₆ + O₂ ⇒ CO₂ + H₂O
Reactants Elements Products
2 Carbon 1
6 Hydrogen 2
2 Oxygen 3
Balanced chemical reaction
2C₂H₆ + 7O₂ ⇒ 4CO₂ + 6H₂O
Reactants Elements Products
4 Carbon 4
12 Hydrogen 12
14 Oxygen 14
When the reaction is balanced the coefficient for CO₂ is 4.