Dentify the following statements as true or false. (use the drop-down menu and select "true" or "false" for each. you must get all 6 correct.) both δssys and δssurr must equal zero at equilibrium. the boiling of water at 105°c and 1 atm is a spontaneous process. all systems become more disordered spontaneously. all spontaneous reactions occur quickly. the energy of the universe is constant; the entropy of the universe decreases towards a minimum. if a process increases the randomness of the particles of a system, the entropy of the system increases.

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.