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nhiet do 0C /
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-6 ------------------------------------------>thoi gian
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a)chat nay nong chay o nhiet do nao ?
b)chat nay la chat gi ?
c)de dua chat nay tu -60C toi nhiet do nong chay can bao nhieu thoi gian?
d)su nong chay bat dau tu phut thu may?
e)thoi gian nong chay cua chat nay keo dai bao nhieu phut?
lm nhanh ho mik nha cac bn.please !!!
lm hoi te nhung mong cac bn hepl
co len cac bn