Answer:
5.85 moles
Explanation:
Moles in (3.52 X 10^24) molecules of water. 3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.
Answer:
Yes it is
Explanation:
You use electricity to power the blender itself, then after you power it the potential energy becomes kinetic energy which equals mechanical energy in the blender. So yes, a blender is an example of electrical to mechanical energy.
Answer:

Given:
Mass = 11.29 g
Volume = 2 cm³
To Find:
Density of unknown metal
Explanation:
Formula:

Substituting value of mass & volume in the formula:

20 grams of borax contains (20.0g) / (201 g mol -1) =0.10 mol of borax.
Therefore 0.40 mol of borax
Answer:
Incomplete question: A student prepares a 0.54 mM aqueous solution of butanoic acid...
The answer is: The percentage of dissociation is 15.4%
Explanation:
Given:
Ka = 1.51x10⁻⁵
Concentration = 0.54 mM = 0.54x10⁻³M
The reaction is:
C₄H₈O₂ = C₄H₇O₂⁻ + H⁺
I 0.54x10⁻³ 0 0
E 0.54x10⁻³(1-x) 0.54x10⁻³x 0.54x10⁻³x
Where x is the degree of dissociation
![Ka=\frac{[H^{+}][C_{4}H_{7}O_{2}^{-} }{[C_{4}H_{8}O_{2} } \\1.51x10^{-5} =\frac{0.54x10^{-3}x^{2} }{1-x} \\x^{2} +0.028x-0.028=0\\x_{1} =0.154\\x_{2} =-0.182](https://tex.z-dn.net/?f=Ka%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BC_%7B4%7DH_%7B7%7DO_%7B2%7D%5E%7B-%7D%20%20%20%20%20%7D%7B%5BC_%7B4%7DH_%7B8%7DO_%7B2%7D%20%20%20%7D%20%5C%5C1.51x10%5E%7B-5%7D%20%3D%5Cfrac%7B0.54x10%5E%7B-3%7Dx%5E%7B2%7D%20%20%7D%7B1-x%7D%20%5C%5Cx%5E%7B2%7D%20%2B0.028x-0.028%3D0%5C%5Cx_%7B1%7D%20%3D0.154%5C%5Cx_%7B2%7D%20%3D-0.182)
We will choose the positive value
x = 0.154
The percentage of dissociation is 15.4%