какая масса углекислого газа выделиться при сжигании 8г метана?

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Douglas (to arrive) at Kennedy Airport and (to come) up to the check-in desk. He (to put) his luggage
on the scales, but the man at the desk (not to look) * at his things.
«You (to go) for a holiday?» he (to ask).
«Yes,» Douglas (to answer).
«You ever (to be) to Switzerland?»
«No, I never (to be) out of the United States.»
«You (to be going) to ski?»
«Certainly.»
«Why you (not to have got) skis with you?»
«I (to buy) them there.»
«Hope the weather (to be) good.»
Douglas (to show) the clerk his ticket and passport and the man (to give) him a boarding-pass. He (to
be) early and he (to have) time to drink a cup of coffee and to read the evening newspaper.
Half an hour later he (to get on) the plane together with the other passengers.