Use dimensional analysis and the given densities to perform the following conversions,
a) What is the volume, in milliliters, of a sample of boron with a mass of 24.8 g?
The density of boron is 2.34 g/cm'.
b) What is the volume, in cubic centimeters, of a 7.62 g sample of mercury?
The density of mercury is 13.5 g/cm,
rocoding archlem (#hy annlying the density equation

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Ответ:

bluesea55988

19.08.2021

Chemistry

The molarity of the solution is 1.854 mol/L

Explanation:

The weight of $Na_{2}C_{2}O_{4}$ present in 131.64mL of 2.7 M solution:

$Molarity=\frac{no.\:of\:moles}{Volume\:of\:solution\:in\:L}\\Molarity\:of\:the\:solution=2.7M\\Volume\:of\:solution=131.64ml=0.13164L\\No.\:of\:moles=0.355428\\Weight\:of\:Na_{2}C_{2}O_{4}=43.36g\\To\:this\:solution\:14.13g\:of\:Na_{2}C_{2}O_{4}\:is\:added.\\Total\:weight\:of\:Na_{2}C_{2}O_{4}=57.49g\\No.\:of\:moles=0.471\\Final\:Volume\:of\:Solution=254.18mL=0.25418L\\Molarity\:of\:the\:final\:solution=\frac{0.471}{0.25418}=1.854\:mol/L$

Hence, the molarity of the solution is 1.854 mol/L

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