A student needs to prepare 2.0 liters 0.60 M NaOH solution from a 8.0 M NaOH stock
solution. How many milliliters of stock solution should the student use?(1 point)
150 ml
225 ml
250 ml
275 ml

Answer : option a) 84explanation :

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.

The state or quality of being humid.a quantity representing the amount of water vapor in the atmosphere or a gas.

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.

It will be b hydrogen