Answer:
Mendeleev had left the noble gases out of his periodic table.
Explanation:
Mendeleev's periodic table is pictured in the image attached to the question.
Mendeleev's table obviously lacked the noble gases. The reason for this grave omission is simple; the noble gases were not known as at the time when he formulated his periodic table. There weren't any known elements whose properties were similar to the properties of the noble gases. This would have lead him to suspect their existence.
The process by which rocks are broken down to form soil is called weathering. It is divided into 3 types, physical, chemical and biological weathering.
Physical weathering is the process by which rocks are broken down as a result of physical agitations. It is also called mechanical weathering and during this process the chemical nature of the rock is not affected. Biological weathering has to do with the weakening of rocks and their eventual disintegration as a result of plants and animals activities. Chemical weathering refers to the disintegration of the rock particles as a result of chemical reactions.
Answer:
9.99L
Explanation:
you can see the answer at the pic
Answer:
a
b
c
Explanation:
From the question we are told that
The reaction of cyclobutane and oxygen is
ΔH°f (kJ mol-1) : C4H8(g) = 27.7 ; CO2(g) = -393.5 ; H2O(g) = -241.8 ΔH° = kJ
Generally ΔH° for this reaction is mathematically represented as
![\Delta H^o _{rxn} = [[4 * \Delta H^o_f (CO_2_{(g)} ) + 4 * \Delta H^o_f(H_2O_{(g)} ] -[\Delta H^o_f (C_2H_6_{(g)} + 6 * \Delta H^o_f (O_2_{(g)}) ] ]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%20_%7Brxn%7D%20%3D%20%5B%5B4%20%2A%20%5CDelta%20H%5Eo_f%20%28CO_2_%7B%28g%29%7D%20%29%20%2B%204%20%2A%20%5CDelta%20H%5Eo_f%28H_2O_%7B%28g%29%7D%20%5D%20-%5B%5CDelta%20H%5Eo_f%20%28C_2H_6_%7B%28g%29%7D%20%2B%206%20%2A%20%5CDelta%20H%5Eo_f%20%28O_2_%7B%28g%29%7D%29%20%5D%20%5D)
=> ![\Delta H^o _{rxn} = [[4 * (-393.5) + 4 * (-241.8) ] -[ 27.7 + 6 * 0]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%20_%7Brxn%7D%20%3D%20%5B%5B4%20%2A%20%28-393.5%29%20%2B%204%20%2A%20%28-241.8%29%20%5D%20-%5B%2027.7%20%2B%206%20%2A%200%5D)
=>
Generally the total heat capacity of 4 mol of CO2(g) and 4 mol of H2O(g), using CCO2(g) = 37.1 J K-1 mol-1 and CH2O(g) = 33.6 J K-1 mol-1. C = J K-1 is mathematically represented as
![H = [ 4 * C_{CO_2_{(g)}} + 6* C_{CH_2O_{(g)}}]](https://tex.z-dn.net/?f=H%20%20%3D%20%5B%204%20%2A%20C_%7BCO_2_%7B%28g%29%7D%7D%20%2B%206%2A%20C_%7BCH_2O_%7B%28g%29%7D%7D%5D)
=> ![H = [ 4 * 37.1 + 6* 33.6 ]](https://tex.z-dn.net/?f=H%20%20%3D%20%5B%204%20%2A%2037.1%20%2B%206%2A%2033.6%20%5D)
=>
From the question the initial temperature of reactant is 
Generally the enthalpy change(
) of the reaction is mathematically represented as
=> 
=>
Answer:
The seafloor
Explanation:
the bottom of the ocean, aka the sea floor.
usually made from sand
