How many grams of carbon dioxide are produced when 191 g of methane (CH4) are burned completely down as shown in the reaction below: CH4+2O2--->CO2+2H20

Mass = 525.36 g

Explanation:

Given data:

Mass of CO₂ formed = ?

Mass of CH₄ burned = 191 g

Solution:

Chemical equation:

CH₄ + 2O₂     →     CO₂ + 2H₂O

Number of moles of CH₄:

Number of moles = mass/molar mass

Number of moles = 191 g/ 16 g/mol

Number of moles = 11.94 mol

Now we will compare the moles of CH₄ and CO₂.

                CH₄          :          CO₂

                 1              :            1

                11.94        :         11.94

Mass of  CO₂:

Mass = number of moles × molar mass

Mass = 11.94 mol × 44 g/mol

Mass = 525.36 g

the answer is na (sodium)

the answer is option a.