What is the mass of 0.38 moles of cobalt?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space

Fred is studying a substance that is made out of only one element. this means that