Cho m gam KMnO4 tác dụng với HCl đặc dưthu được 6,7 lít Cl2 ở dktc. H=80%.giá trị m là

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Define a is a tiny pavket of energy