Nguyễn Phạm Quỳnh chi
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2026-04-21 23:02:50
Last summer, I had a memorable trip to an ethnic village in the mountains. The journey was long, but the fresh air and beautiful scenery made it worthwhile. When I arrived, I was warmly welcomed by the local people. They showed me their traditional houses, colorful clothes, and unique customs. I also enjoyed delicious local food and watched a traditional dance performance in the evening. This trip helped me understand more about their culture and simple way of life. I will never forget this meaningful experience.
2026-03-29 15:31:04
4P+5O2→2P2O5
P2O5 +3H2O → 2H3PO4
2H3PO4 + 3Na2O → 2Na3PO4 + 3H2O
2Na3PO4 + 3CaCl2 → 6NaCl + Ca3(PO4)2