PLS HELP ME CORRECT ANSWER GETS BRAINIEST The actual density of copper is 3.1 g/cm3
a) What is the error
b) Calculate the PE, Percent Error (0.1%)

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.