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According to boyle p1v1=p2v2
So 3*4=6*x so x=2
answer: 3.40625 moles
Explanation: see the attached pics
Answer:
A delta is formed when the river deposits its material faster than the sea can remove it. ... Cuspate - the land around the mouth of the river juts out arrow-like into the sea. The Ebro Delta. Bird's foot - the river splits on the way to the sea, each part of the river juts out into the sea, rather like a bird's foot.
I hope it's helpful!