Mộtbình10Lchứa0,2molmethane,0,3molh ydrogen,0,4molnitrogenở25oC. a)Tínhápsuấttrongbình(đơnvịatm)b)Tí nhápsuấtriêngphầncủamỗicấutửkhítron ghỗnhợp

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Stage in which a typical star has completely stopped fusion

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.