Element M has three shells The first three successive ionisation energies for element M increase gradually but the fourth ionisation energy increases sharply a) Write the electronic configuration for element M and explain.​

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %