Explanation:
The relation between change in entropy and is as follows.
The given data is as follows.
mass = 500 g
= 24.4 J/mol K
= 500 K
= 250K
As, atomic mass of copper = 63.54 g /mol. Therefore, number of moles of copper will be calculated as follows.
Number of moles =
=
= 7.86 moles
Hence,
= 750
For the metal block A,
=
= -3.04 J/ K mol
For the block B,
= 4.296
Therefore, calculate the change in entropy as follows.
Total entropy change = 4.296 + (-3.04)
= 1.256 J/Kmol
Thus, we can conclude that the change in entropy for given two blocks of copper is 1.256 J/Kmol
.
The empirical formula will be CHCl
<h3>What is the empirical formula?</h3>
The simplest whole number ratio of atoms in a compound is the empirical formula of a chemical compound in chemistry. Sulfur monoxide's empirical formula, SO, and disulfur dioxide's empirical formula, S2O2, are two straightforward examples of this idea. As a result, both the sulfur and oxygen compounds sulfur monoxide and disulfur dioxide have the same empirical formula. They do not, however, have the same molecular formula, which specifies how many atoms are present in each molecule of a chemical compound.
For saran
C= 24.8% ,
H= 2.0% ,
Cl = 73.1%
= 24.8/ 12 = 2.0
= 2.0/1=2.0
= 73.1/ 35 = 2.0
Now, dividing each mole by the smallest moles (hydrogen's moles), one obtains:
C= 2.0 / 2.0 = 1
H= 2.0/2.0 = 1
Cl = 2.0/ 2.0 = 1
The empirical formula will be CHCl
Learn more about empirical formula here:-
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This is formula to find pH. -log[H^+]
now press calculator -log[4.7×10^11] and you will get 10.33
Iron Fluoride
A chemical compound is a substance composed of atoms from two or more (different) elements. These compounds are formed by the creation of chemical bonds between the atoms of the different elements.
Helium and Neon are both elements, and in particular, they belong to a group of chemical elements called noble gases. Being noble gases, they are very stable and do not react easily.
Iron fluoride is a chemical compound consisting of the metal, iron, and the nonmetal, fluorine. When a metal and a nonmetal react to form a compound, they form ionic bonds to hold together the atoms of the different elements comprising the compound.