Answer:
The answer is
<h2>7.0 g/cm³</h2>Explanation:
The density of a substance can be found by using the formula
From the question
mass of rock = 14 g
volume = 2 cm³
The density of the rock is
We have the final answer as
<h3>7.0 g/cm³</h3>Hope this helps you
Answer:
The pH of the solution is 2.56.
Explanation:
Given :
Concentration (c) = 0.40 M
Acid dissociation constant =
The equilibrium reaction for dissociation of (weak acid) is,
initially conc. c 0 0
At eqm.
Dissociation constant is given as:
By solving the terms, we get value of
No we have to calculate the concentration of hydronium ion or hydrogen ion.
Now we have to calculate the pH.
Therefore, the pH of the solution is, 2.56.
Answer:
108.76 amu is the mass of 109Ag
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.
For first isotope, 109Ag:
% = 51.82 %
Mass = x amu
For second isotope, 107Ag:
% = 100 - x = 100 - 51.82 % = 48.18 %
Mass = 106.905 amu
Given, Average Mass = 107.868 amu
Thus,
Solving for x, we get that:
x = 108.76 amu
<u>108.76 amu is the mass of 109Ag</u>
