Answer : The incorrect statements are:
(A) When two nonmetals react, the compound formed is ionic.
(B) Two nonmetals can undergo an oxidation-reduction reaction.
Explanation :
Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.
The covalent compound are usually formed when two non-metals react.
The two nonmetals can not undergo an oxidation-reduction reaction.
Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.
Ionic compound are usually formed when a metal reacts with a non-metal.
The metal-nonmetal reaction can always be assumed to be an oxidation-reduction reaction.
For example : 
In this reaction, sodium shows oxidation because the oxidation state changes from (0) to (+1) and and chlorine shows reduction because the oxidation state changes from (0) to (-1).
Hence, the incorrect statements are, (A) and (B)
582 ml is the volume of gas.
Answer:
Explanation:
Using the ideal law of gases, the kinetic theory of gas can be stated as
PV = nRT
Here P is the pressure and it is given as 1.2 atm, V is the volume, which we need to find. Then R is the gas constant and T is the temperature while n is the concentration present.
As per the give question, P = 1.2 atm, T = 140 K and n = 0.5 moles, R = 8.314
V = 
V = 
So 582 ml is the volume of gas.
Answer:
It is called Asterism.
Explanation:
It is Asterism because Asterism refers to a pattern of stars that are seen in night sky and are very distinctive and identifiable. These group of starts have patterns. It visually seen collection of stars and it's indicate their properties and the lines that connect the stars together. It actually range from small shapes of stars to more complex stars that cover segment of the sky. The stars may be bright naked or have similar brightness.
Answer:
<h2>1.93 × 10²⁴ atoms</h2>
Explanation:
The number of atoms in a substance can be found by using the formula
<h3>N = n × L</h3>
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 3.21 × 6.02 × 10²³
We have the final answer as
<h3>1.93 × 10²⁴ atoms</h3>
Hope this helps you
Answer:
The equilibrium constant, K, for the reaction = 0.23
Explanation:
Given that
initial concentrations of phenol(C₆H₅OH) = 0.2 Molar
& concentration of ammonia = 0.12 Molar
At equilibrium the phenoxide ion concentration (C₆H₅O⁻) = 0.05 Molar
C₆H₅OH(aq) + NH₃(aq) ⇄ C₆H₅O⁻(aq) + NH₄⁺(aq)
Initial conc. 0.2 0.12 0 0
Equilibrium (0.2 - 0.05) (0.12 - 0.05) 0.05 0.05
= 0.15 = 0.07
According to law of mass action
![K_{c} =\frac{[C_{6}H_{5}O^{-} ][NH_{4}^{+} ]}{[C_{6}H_{5}OH ][NH_{3} ]}](https://tex.z-dn.net/?f=K_%7Bc%7D%20%3D%5Cfrac%7B%5BC_%7B6%7DH_%7B5%7DO%5E%7B-%7D%20%20%20%5D%5BNH_%7B4%7D%5E%7B%2B%7D%20%20%5D%7D%7B%5BC_%7B6%7DH_%7B5%7DOH%20%20%5D%5BNH_%7B3%7D%20%5D%7D)
