Answer:
<u>Radiation is the transfer of energy by waves, and conduction is the transfer of heat through contact with air.</u>
Explanation:
Conduction is the transfer of thermal energy through direct contact. Radiation is the transfer of thermal energy through thermal emission.
Explanation:
Population density is defined as the number of people present per square kilometre. Population density of India according to 2011 census is 382 persons per square kilometres.
The heat will flow from Cu to Fe because Cu has higher temperature and has lower peak value .
Given ,
two aircraft rivets , one iron and the other copper , are placed in a calorimeter .
the initial temp of the calorimeter is 20 degC .
mass of iron = 30 g
initial temp of iron = 0 degC
Mass of copper = 20 g
initial temp of copper = 100 degC
Here copper has higher temp ,thus heat flow from Cu to Fe .
<h3>
What is heat flow ?</h3>
Heat flow is the movement of heat from higher temperature to lower temperature .
<h3>What is calorimeter ?</h3>
It is an object used for measuring the heat flow , heat capacity of a chemical reaction as well as the physical changes .
Learn more about calorimeter here :
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Answer:
affected by the concentration of the The exponents in a rate-law expression define the reactant. O concentration o instantaneous rate O specific rate constant
Explanation:
Answer:
(a) 4
(b) 7
(c) 8
(d) 8
(e) 4
Explanation:
In order to draw the Lewis structure, we need to take into account the octet rule: atoms will share electrons to have 8 electrons in their valence shell.
<em>(a) How many valence electrons does Si have initially? </em>
Si has 4 valence electrons. It has to share 4 pairs of electrons to reach the octet.
<em>(b) How many valence electrons does each Cl have initially? </em>
Cl has 7 valence electrons. Each Cl has to share 1 pair of electrons to reach the octet.
<em>(c) How many valence electrons surround the Si in the SiCl₄ molecule? </em>
Si is surrounded by 8 electrons in SiCl₄.
<em>(d) How many valence electrons surround each Cl in the SiCl₄ molecule? </em>
Each Cl is surrounded by 8 electrons in SiCl₄.
<em>(e) How many bonding pairs of electrons are in the SiCl₄ molecule?</em>
There are 4 bonding pairs between Si and Cl.
