[tex]mass = number \: of \: moles \times molar \: mass[/tex]
[tex]m = 2.36(223.2) = 526.752 \: grams[/tex]
[tex]n = \frac{mass}{molar \: mass} = \frac{23.5}{58.4} = 0.40239 \: moles[/tex]
[tex]n = \frac{0.778}{49} = 0.0158775 \: moles[/tex]
[tex]n = \frac{number \: of \: particles}{avogadros \: constant} [/tex]
[tex]n \: o \: p = 0.0455 \times 6.02 \times 10 {}^{23} = 2.7391 \times 10 {}^{22} particles[/tex]