30 which radioisotopes have the same decay mode
and have half-lives greater than 1 hour?
(1) au-198 and n-16 (3) i-131 and p-32
(2) ca-37 and fe-53 (4) tc-99 and u-233

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?