6) How many moles would be in 25 grams of NaCl?

0.43 mol

Explanation:

The molar mass of NaCl = 58.44 g/mol

Therefore, the number of moles in 25 grams would be: 25g ÷ 58.44 g/mol = 0.43 mol

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

2b2t

explanation:

2b2t