PLEASE HELP ME

what would be the mass of 9.03 x 1021 molecules of hydrobromic acid (HBr)?

We know 1 mole of any atom or molecules contains atom or molecules.

1 mole of HBr i.e 81 gm/mol contains   atom or molecules.

So, mass of molecules is :

Therefore, mass of   molecules is 1.21 gm .

Hence, this is the required solution.

your answer is c) plasma

~*"auba14"*~

answer seismograph;