A cluster of billions of atoms that all have magnetic fields lined up in the same way is known as a

Chemistry

1 answer:

satela [25.4K]3 years ago

6 0

A cluster of billions of atoms that all have magnetic fields lined up in the same way is known as a

The answer is letter C. Magnetic domain.

The region around a magnet where the magnetic force is exerted is known as its
The answer is letter C. Magnetic field.

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A cylinder and piston assembly (defined as the system) is warmed by an external flame. The contents of the cylinder expand, doin

melomori [17]

Answer:

ΔE = 73 J

Explanation:

By the first law of thermodynamics, the energy in the system must conserved:

ΔE = Q - W

Where ΔE is the internal energy, Q is the heat flow (positive if it's absorbed by the system, and negative if the system loses heat), and W is the work (positive if the system is expanding, and negative if the system is compressing).

So, Q = + 551 J, and W = + 478 J

ΔE = 551 - 478

ΔE = 73 J

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3 years ago

How to Calculate the de Broglie wavelength for each of the following ? a. an electron with a velocity 10.% of the speed of light

qaws [65]

H = planks constant
m = mass of the object 
u = velocity of the object 

h = 6.626 * 10^-34 J/s 
the mass of an electron is 9.12*10^-31 kg 
10% speed of light = 10% * 3*10^8 = 3*10^7 m/s, i dont have my graphing calc with me right now so i leave the technicalities up to you

8 0

3 years ago

Nitrogen dioxide and water react to form nitric acid and nitrogen monoxide, like this:

posledela

Answer: The value of the equilibrium constant Kc for this reaction is 3.72

Explanation:

Equilibrium concentration of $HNO_3$ = $\frac{15.5g}{63g/mol\times 9.5L}=0.026M$

Equilibrium concentration of $NO$ = $\frac{16.6g}{30g/mol\times 9.5L}=0.058M$

Equilibrium concentration of $NO_2$ = $\frac{22.5g}{46g/mol\times 9.5L}=0.051M$

Equilibrium concentration of $H_2O$ = $\frac{189.0g}{18g/mol\times 9.5L}=1.10M$

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_c$