Heated bricks or blocks of iron were used long ago to warm beds. a 1.49 -kg block of iron heated to 155 celsius would release how many joules of heat as it cooled to 22 celsius ?

Find the empirical formula of each of the following compounds. given mass or for each element in a sample of the compound 3,611 g ca; 6.389 g c1

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

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.