An 4. Polycarbonate plastic has a density of 1.2 g/cm? A photo frame is
constructed from two 0.3cm sheets of polycarbonate. Each sheet
measures 28 cm by 22 cm. What is the mass of the photo frame?

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

Define the kinetic molecular theory

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.