Respuesta :
Answer: 336.5 grams
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
convert given masses into moles.
Number of Moles =[tex]\frac{\text{ given mass}}{\text{ molar mass}}[/tex]
Given number of moles = 1.36
Molar mass of [tex]SrBr_2[/tex] = 247.43 g/mol
Putting in the values we get
[tex]1.36=\frac{\text {given mass}}{247.43g/mole}[/tex]
[tex]{\text {given mass}}=336.5grams[/tex]
Thus mass of strontium bromide used should be 336.5 grams.
