Which is a measurement of distance that is used around the world?

30 miles

500 meters

16 kilograms

24 feet

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Lord kelvin described the concept of absolute zero temperature and the laws relating to the change of thermal energy during chemical reactions what type of chemist would he be considered today

What is the daughter nucleus produced a. when 217(at) undergoes alpha decay? b. when 103(mo) undergoes beta decay? c. when 188(hg) undergoes positron emission?