Answer:
Number of moles of C₂H₂ = 13.3 mol
Number of moles of Co = 0.92 mol
Explanation:
Given data:
Number of molecules of C₂H₂ = 7.98 ×10²⁴
Number of moles of C₂H₂ = ?
Mass of Co = 25.8 g
Number of moles of Co = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For C₂H₂:
1 mol = 6.022 × 10²³ molecules
7.98 ×10²⁴ molecules × 1 mol / 6.022 × 10²³ molecules
1.33×10¹ mol
13.3 mol
For Co:
Number of moles = mass/ molar mass
Number of moles = 25.8 g/ 28 g/mol
Number of moles = 0.92 mol
A chemical reaction is a spontaneous reaction is determined by the Gibb's energy and enthalpy of the reaction whether it is exothermic or endothermic. The factors that apply here are heat and entropy. Gibb's energy is related to entropy. Answers are D. and E
Answer:
A. Gas particles are in constant motion.
Step-by-step explanation:
The first postulate of Kinetic Molecular Theory is that gas particles are in constant motion.
B is <em>wrong</em>. Kinetic Molecular Theory assumes that there are no attractive forces between the molecules.
<em>C is wrong</em>. Kinetic Molecular Theory assumes that collisions between molecules are elastic.
<em>D is wrong</em>. Kinetic Molecular Theory assumes that there are no attractive forces between the molecules of the gas and those of its container.
Answer:
The correct answer is - option C. The equilibrium is shifted to the left and the value of K decreases.
Explanation:
The combustion of the methane produces water vapor, carbon dioxide when burns in presence of oxygen. This reaction also releases heat and light when combustion occurs.
CH4(g) +2O2(g)-----> CO2(g)+ 2H2O(g) + Heat
As this reaction releases the heat which means it is an exothermic reaction and as if the temperature increase, the equilibrium constant decreases, and as it decreases the equilibrium shifted to the left.
Thus, the correct answer is - option C.
Answer:
Explanation:
The major regulation, regulatory, and communicating system in the body is the nervous system. It is the foundation of all mental operation, including thinking, learning, and memory. The nervous system, along with the endocrine system, is responsible for controlling and sustaining homeostasis.