Answer:
7.08
Explanation:
First, we need to write a balanced dissociation equation equation for HCl. This is illustrated below:
HCl <==> H+ + Cl-
Now, we see clearly that 1mole of HCl produced 1mole of H+. This means that 8.4x10^-8M HCl will also produce 8.4x10^-8 M H+
Now, we can obtain the pH as follows:
[H+] = 8.4x10^-8 M
pH = —Log [H+]
pH = —Log 8.4x10^-8
pH = 7.08
Answer:
<u>In this reaction heat is released</u>
Explanation:
Exothemic Reactions : Those reactions in which heat is released when the products are formed .
For such reaction The enthalpy change is negative.
for exothermic reaction
Endothermic Reactions : Those reaction which proceed by absorbing heat . Here heat is absorbed. The enthalpy change for such reactions is positive.
When the direction of reaction reverses , the value of H also changes.
In the given reaction,
= heat is absorbed
So,
= heat is<u> released</u>
<u></u>
<u>E</u><em>xothermic reactions are more spontaneous as compared to endothermic ractions. This means that they proceed own their own . Only little amount of energy is supplied to exothermic reaction to produce the prodct.</em>
Answer:
<h3>The answer is 8.33 g/mL</h3>
Explanation:
The density of a substance can be found by using the formula
From the question
mass = 100 g
volume = 12 mL
We have
We have the final answer as
<h3>8.33 g/mL</h3>
Hope this helps you
Please refer to this. Here is the oxidation number of nitrogen in aluminum nitride, aln. <span>Since AlN has 0 charge and Al has +3 charge; charge for N = 0 - (+3) = -3. Hope this is the answer that you are looking for. Have a great day ahead!</span>
The atomic radii of the atoms in the group 1 increases down the group as we go from Hydrogen to Francium.
<h3>What is atomic radii ?</h3>
The total distance from the nucleus of an atom to the outermost orbital of its electron is known as its atomic radii or atomic radius.
As we go down the group, the number of orbits or shell increases.
Hence, atomic radii of the atoms in the group 1 increases down the group as we go from Hydrogen to Francium.
Learn more about atomic radii here ;
brainly.com/question/14086621
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