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3 years ago

What is magnetism? please answer

Chemistry

2 answers:

N76 [4]3 years ago

3 0

Answer:

a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

Explanation:

vivado [14]3 years ago

3 0

Answer:

Explanation:

Magnetism is the power to attract. It refers to the attraction to iron and other metals in electric currents and magnets, or to the other kind of attraction — where people want to be close to each other.

plz mark as brainliest

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What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should

horsena [70]

Answer:

$J_{m} = 20$

$J_{m} = 22.5$

Explanation:

From the question we are told that

The first temperatures is $T_1 = 25^oC = 25 +273 =298 \ K$

The second temperature is $T_2 = 100^oC = 100 +273 = 373 \ K$

Generally the equation for the most highly populated rotational energy level is mathematically represented as

$J_{m} = [ \frac{RT}{2B}] ^{\frac{1}{2} } - \frac{1}{2}$

Here R is the gas constant with value $R =8.314 \ J\cdot K^{-1} \cdot mol^{-1}$

Also

B is given as $B=\ 0.244 \ cm^{-1}$

Generally the energy require per mole to move 1 cm is 12 J /mole

So $0.244 \ cm^{-1}$ will require x J/mole

$x = 0.244 * 12$

=> $x = 2.928 \ J/mol$

So at the first temperature

$J_{m} = [ \frac{8.314 * 298 }{2* 2.928 }] ^{\frac{1}{2} } - 0.5$

=> $J_{m} = 20$

So at the second temperature

$J_{m} = [ \frac{8.314 * 373 }{2* 2.928 }] ^{\frac{1}{2} } - 0.5$

=> $J_{m} = 22.5$

3 0

3 years ago

2.00 L of 0.500 M H2SO4 (density = 1.030 g/mL) at 25.000°C is mixed with 200. g of a NaOH solution, also at 25.000°C. After stir

AfilCa [17]

Answer:

Q = 111.8 kJ;

The reaction is endothermic.

Explanation:

The heat of the mixture can be calculated by the equation:

Q = m*c*ΔT

Where Q is the heat, m is the mass of the solution, c is the specific heat, and ΔT is the variation in the temperature (fina - initial).

The mass of H₂SO₄ is the volume multiplied by its density:

mH₂SO₄ = 2000 mL * 1.030 g/mL = 2060 g

Then the total mass is:

m = 2060 + 200

m = 2260 g

Q = 2260*4.184*(36.820 - 25.000)

Q = 111,468.03 J

Q = 111.8 kJ

The reaction is endothermic because the solution is absorbing heat (Q > 0), which can be noticed by the increase in the temperature. When the reaction loses heat, it is exothermic and the temperature decreases.

4 0

3 years ago

An electrolytic cell Group of answer choices consumes electrical current to drive a nonspontaneous chemical reaction. produces e

Rzqust [24]

Answer:

produces electrical current from electricity. produces electrical current from a nonspontaneous chemical reaction.

Explanation:

An electrolytic cell converts electrical energy into chemical energy. Here, the redox reaction is spontaneous and is responsible for the production of electrical energy. The reaction at the anode is oxidation and that at the cathode is reduction. Here, the anode is positive and the cathode is the negative electrode.

3 0

3 years ago

Suppose you are a particle og watet in a lake. Describe what happens to you when a motorboat passes by.

Tamiku [17]

i will move and collapse with other h20 particles and splash around

3 0

3 years ago

How does the properties of matter in liquid and gas state allow the Herons fountain to work?

Varvara68 [4.7K]

Answer:

Heron's fountain is an hydraulic machine that works because or the pressure inside of the system. Water will flow from high gravitational potential energy to low gravitational potential energy. The two sides of the system will present different pressure because they have different fluids in it (water and air) and water pressure is higher than gas/air pressure, so it will flow.

It is important to take into account that the pressure in the columns is a function of the height of the fluid (water or air).

Explanation:

<u>The properties of liquid:</u>

- If a liquid is poured into a container, it will adapt to the container's shape

- In a liquid state, the molecules have a kinetic energy higher than in a solid state

- Liquid particles are not arranged in a regular way but they are very close to each other, that's why liquids have a definite volume.

- Force is spread in an even way through a liquid, so the liquid particles are displaced if an object is placed in it.

- Liquids, as solids, can't be compressed

<u>The properies of gas:</u>

- They are everywhere

- Gas molecules are disorganized and have a great deal of space between them

- Gas fill up any container and spread indefinitely

- Gas molecules have a high kinetic energy

- If gas is put under pressure, the space between particles will decrease and collisions between them will increase.

- If the temperature of the gas increases in a container, the pressure will increase; if the temperature decreases, the pressure sill decrease.

- It can be compressed

- Gas has no definite volume nor definite shape.

8 0

3 years ago