Chemistry, 26.02.2021 01:00 madistupid

What is the change in volume when 12 grams of Hz and 56 grams of N2 react to completion at STP.
+ N2 – 2 NH3
3H 2 (8)
O The system decreases in volume by about 88 liters
O The system decreases in volume by about 22 liters
O The system decreases in volume by about 44 liters
The system increases in volume by about 88 liters

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What is the change in volume when 12 grams of Hz and 56 grams of N2 react to completion at STP.