dip a clean wire loop into a solid sample of the compound being tested put the loop into the edge of the blue flame from a Bunsen burner observe and record the flame ...
Dr Peter Wothers explores the properties of fire with three students at his laboratory in the University of Cambridge’s Department of Chemistry ... what makes up a flame, and measure the ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果