Answer:
221.37 u
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
For first isotope:
% = 65.51 %
Mass = 223.95 u
For second isotope:
Since the element has only 2 isotopes, so the percentage of second is 100 - first percentage.
% = 100 % - 65.51 % = 34.49 %
Let, Mass = x u
Given, Average Mass = 223.06 u
Thus,
Solving for x, we get that:
x = 221.37 u
<u>Thus mass of second isotope = 221.37 u</u>
<span><span>NaOH + HCl --> NaCl + H2Oso here 1 mole of NaOH reacts with 1 mole of HCl. Hence it is required to convert the amount of HCl and NaOH in to moles.Number of HCl moles Concentration of the solution = 2.00M = 2 mol/ literVolume of the solution = 22.4 mlNumber of HCl moles = (2mol/1000 ml)*22.4 ml = 0.0448 mol</span></span>
The answer to your question is C
The element having valency of 1 is ~
Answer:
D.
They have a positive charge and are present in the nucleus of an atom along with the neutrons.
explanation:
Protons have a positive charge.