A 5.10 kg cast-iron skillet is heated on the stove from 295 K to 450 K. How much heat had to be transferred to the iron (specific heat of iron is 450J/kg K)?

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

Which of the following is the best name for mgcl2

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?