The half-life for the decay of radium is 720 years. What is the rate constant for this first- order process?

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

What is the percentage composition of carbon in the compound ch4