Khử hoàn toàn 17.6g hỗn hợp gồm fe, feo, fe203 cần 2.24 lít khí CO(đktc) khối lượng sắt thu được là

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

What is the name of this hydrocarbon?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.