Which statement is true?

a.

opinions can be scientifically tested.

b.

scientific theories are absolute and cannot be changed.

c.

scientists have learned all they’ll ever know about science.

d.

facts can be scientifically tested.

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

When a nucleus absorbs a neutron and then breaks apart, there are many products of the reaction. what is not a product of a nuclear fission reaction

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.