Chemistry, 12.03.2021 03:40, nourmaali

A hydrochloric acid solution contains 36 percent HCl by mass. Calculate its
molality

Answers: 2

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The Molarity M of a solute in a solution is defined as:

M=moles of solution / kilograms of solvent

Mass %= (mass solute/mass solution)x100%

Assume 100g of solution

Find moles of solute

Mass solute = (mass %/100%)mass solution

=(36%/100)100g=36 gHCL

36 gHCL 1 mol HCL/36.458 gHCL= 0.987molHCL

36% HCL by mass 100 g solution
36g HCL 0.987Mol HCL

Molarity=moles solute/kg solvent

Find kg solvent
Mass solution = mass solute + mass solvent
Mass solvent = mass solution - mass solute
= 100 g-36=64 g solvent

64 g solvent = 1 kg solvent/1000 g solvent = 0,064 kg solute

Molarity= molHCL/0.064 kg solvent

=0.987/0.064
=15.42 mHCL

answered: Guest

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i

answered: Guest

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.

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A hydrochloric acid solution contains 36 percent HCl by mass. Calculate its
molality...