A 0.3 gram piece of copper is heated and fasioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 Joules. If the specific heat of copper is 390J/gxC, what is the change of the copper's temperature? (4 sig figs)

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

What atom has the largest atomic radius