Conduction
Explanation:
If one touches a hot iron, the mode of heat transfer is conduction. Heat moves from a region of higher temperature to one at lower temperature until thermal equilibrium is established.
- There are three modes of heat transfer which are conduction, convection and radiation.
- Heat transfer by contact of one body with another is conduction. A hot body in contact with a cold one transfers heat by the vibration of particles of the medium.
- This is exemplified when a hot pot is touched.
Learn more:
Heat transfer brainly.com/question/1140127
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KE = (1/2)mv^2
m = 10.0 kg
v = 5.00 m/a
KE = (1/2)(10.0)(5.00)^2 = (1/2)(10.0)(25.0) = 125 J
C. 125 J
Number of atoms : 1.26 x 10²³
<h3>Further explanation </h3>
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
0.21 moles of Al, so n = 0.21
Number of atoms :
The given compound is 
Each formula unit of has 2 mol Potassium (K) atoms, 2 mol Chromium (Cr) atoms and 7 mol Oxygen (O) atoms.
Atomic weight of potassium is 39.0983 amu
Atomic weight of Chromium is 51.9961 amu
Atomic weight of Oxygen is 15.9994 amu.
Therefore the formula weight of 
= 294.1846 amu
I believe the answer is A.
