<span>Mass of KCl= 88.4g
</span>Molar mass of KCl=39+35.5
<span> =74.5
</span><span> The Moles of KCl= 88.4/74.5
</span> =1.186
<span>If for the 2 moles of KCl there are 3 moles of oxygen
</span>so
<span>1 mole of KCl will give=3/2=1.5 moles of oxygen
</span>
<span>1.186 moles of KCl will give =1.5*1.186=1.779 oxygen
</span><span>32 the molar mass of oxygen
</span>so its mass will be
<span>1.779 *32=56.928
</span>enjoy
The pH of the solution is obtained as 2.23.
<h3>What is the pKa?</h3>
The pKa shows the extent to which an acid is dissociated in solution. Now we have;
HCOOH(aq) + H2O(l) ⇔ HCOO-(aq) + H30+(aq)
Ka = [HCOO-] [ H30+]/[ HCOOH]
But = [HCOO-] = [ H30+] = x
Ka = x^2/[HCOOH]
x = √Ka [HCOOH]
x = √0.19 * 1.8×10−4
x = 5.8 * 10^-3
pH = - log (5.8 * 10^-3)
pH = 2.23
Learn more about pH:brainly.com/question/2288405
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Synthetic elements are man-made elements. ... Synthetic elements are unstable chemical elements and they are not naturally found on the earth. These elements are synthesized in the laboratory. All of them are unstable and radioactive in nature, which means they emit radiations and decay into other elements.
The mass of NaCl : 50.5 g
<h3>Further explanation </h3>
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
There are 5.20 x 10²³ units of NaCl, so mol NaCl :
Mass of NaCl(MW=71 g/mol) :
