What type reaction is 2 ( R b N O 3 + B e F 2 → B e ( N O 3 ) 2 + 2 R b F )

What does x represent in the formula for the compound xcl4?

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?