Answer:
C. Xenon
Explanation:
The question only requires you to use your visual skills to identify the unknown gas. Look at the spectra of unknown gas and xenon, are they not identical? SInce they are same, the unknown sample must be xenon.
Answer:
2.19 x 10^-12.
Explanation:-
The relation between Ka and Kb for an acid and it's conjugate base is
Ka x Kb = Kw where Kw = ionic product of water.
So Kb = 10^-14 / (4.57 x 10 ^ -3)
= 2.19 x 10^-12
As one element .because po4 is phosphate for e.g.: NaPO4
Abbreviation. DNA, which stands for deoxyribonucleic acid, is defined as a nucleic acid that contains the genetic code.
Answer:
The answer is
<h2>14.50 cm³</h2>
Explanation:
The volume of a substance when given the density and mass can be found by using the formula

From the question
mass of iron = 114 g
density = 7.86 g/cm³
The volume is

We have the final answer as
<h3>14.50 cm³</h3>
Hope this helps you