B. Convection.In a convection heat is transferred by the actual movement of the heated fluid particles. This can be seen in boiling water in a kettle.

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Which of the following conclusions can be drawn from JJ Thomson"s cathode ray experiments?A.) Atoms contain electronsB.) Practic

bromheads.tv:

A.) Atoms contain electrons

Explanation:

J.J. Thomson conducted an experiment in which he took a gas at low pressure in a discharge tube and applied high voltage current. When he did so, he noticed that there are some particles emitting from cathode going towards the anode. Then he concluded that they are negatively charged particles and coined them electrons.

Hence, out of the options:- A.) Atoms contain electrons is correct.



Using the average initial pH of your acetic acid solutions (2.96), and the average molarity of those solutions(.0602), calculate

bromheads.tv : The value of Ka for acetic acid is,

*

Explanation :

The chemical formula of acetic acid is,

*
.

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The chemical equilibrium reaction will be:

*

Given:

pH = 2.96

First we have to calculate the concentration of hydrogen ion.

*
" alt="pH=-\log " align="absmiddle" class="latex-formula">

*
" alt="2.96=-\log " align="absmiddle" class="latex-formula">

*
=1.096\times 10^{-3}M" alt="=1.096\times 10^{-3}M" align="absmiddle" class="latex-formula">

That means,

*
==1.096\times 10^{-3}M" alt="==1.096\times 10^{-3}M" align="absmiddle" class="latex-formula">

*
=0.0602-(1.096\times 10^{-3})=0.0591M" alt="=0.0602-(1.096\times 10^{-3})=0.0591M" align="absmiddle" class="latex-formula">

The expression for reaction is:

*
}{}" alt="K_a=\frac{}{}" align="absmiddle" class="latex-formula">

*

*

Thus, the value of Ka for acetic acid is,

*




I don"t think that there is a chemical property of it. here are the physical properties:Melting Point:16.6°C Boiling Point:117.9°CDensity (g/cm3):1.0446 at 25°C 91 atm pressure