4. (10 Points) What is Hess' Law and what is its significance in working with chemical reactions?

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

What is the mass of 0.46 mil of mgcl2

If a particle has z = 25 and 23 electrons, what is its charge?