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loldangdung
2 năm trước
Bài 1: Tính số hạt (nguyên tử hoặc phân tử) có trong: a) 0,4 mol Fe b) 2,5 mol Cu c) 0,25 mol Ag d) 1,25 mol Al e) 0,125 mol Hg f) 0,2 mol O2 g) 1,25 mol CO2 h) 0,5 mol N2
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