Astudent needs to use 0.575 moles of sodium chloride in an experiment. how many grams should he mass out?

The molecular weight of NaCl is 58.44 g/mol.  

0.575 mol * 58.44 g/mol = 33.6 grams of NaCl

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer