A sample of carbon dioxide contains (2.71x10^27) molecules. How many
grams is this? *
!!

198 kg

Explanation:

Please see the step-by-step solution in the picture attached below.

But, I wonder if there any mistake in typing the question.. because the number 198kg is too big. I checked many times, but the answer is the same: 198kg.

(The full weight of CO2 in a typical CO2 fire extinguisher is just about 14kg.)

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.