Answer:
The calculated concentration of HCl will be less than actual.
Explanation:
Suppose during titration, the <em>HCl</em> was taken in burette and the <em>NaOH</em> in the volumetric flask.
Now we will use equivalence formula for the calculation of concentration of HCl.
Where L.H.S is for hydrochloric acid and R.H.S is for sodium hydroxide. The terms N and V represent normality and volume respectively.
If we calculate for
We see that if the volume of the HCl is greater then the concentration of the HCl will be reduced.
It uses <span>nuclear fusion </span>
<span>nuclear fission </span>
<span>hydrogen radioactivity </span>
<span>spontaneous decay
</span>
Answer:
23
Explanation:
Simply remove the brackets and add 14 and 9
Answer:
1) Mendeleev's periodic table grouped elements on the basis of their atomic masses, while the modern periodic table groups elements on the basis of atomic number.
2) As we know, the isotopes of an element will have the same atomic number. This is because there number of protons will be same. Hence, in the modern periodic table the isotopes of an element share the same place.
3) Cobalt is places on the 9th position and nickel on the 10th position. There were arguments before as the atomic mass of nickel was more than cobalt.
4) A position for the hydrogen atom was finally allocated in the modern periodic table which had been a issue in Mendeleev's periodic table. Hydrogen is placed on top of the alkali metals i.e the first group.
Answer:
12
Explanation:
The coefficient of the CO2 shows the amount of CO2 needed in the reaction so to react with 11 water, 12 molecules of carbon dioxide is needed.