2C2H2 + 5O2 --> 4CO2 + 2H20

How many grams of CO2 is produced when 2.50 x 10^4gC2H2 burns completely

2.50 x 10^4gC2H2 * 44.009gCO2/26.038gC2H2 = 4.23x10^4gCO2?

or am i wrong

you erred. You did not use the balanced equation coefficents.

2.50 x 10^4gC2H2 * 4*44.009gCO2/2*26.038gC2H2 = you do it.

Your calculation for finding the grams of CO2 produced when 2.50 x 10^4g of C2H2 burns completely is incorrect. Let's go through the steps again:

First, we need to calculate the molar mass of C2H2 (acetylene) and CO2 (carbon dioxide). The molar mass of C2H2 is 26.038 g/mol, while the molar mass of CO2 is 44.009 g/mol.

Next, we need to set up a conversion factor to convert grams of C2H2 to grams of CO2. This can be done using the ratio of the molar masses of the two compounds:

(44.009 g CO2 / 26.038 g C2H2)

Finally, we can calculate the grams of CO2 produced by multiplying the given mass of C2H2 by the conversion factor:

2.50 x 10^4 g C2H2 * (44.009 g CO2 / 26.038 g C2H2) = 4.23 x 10^4 g CO2

So, your calculation is correct. The correct answer is 4.23 x 10^4 g CO2.