How much energy is needed to turn 23 g of water completely into steam if it starts at a temperature of 8.0oC?

Answer:

Electrolysis, process by which electric current is passed through a substance to effect a chemical change. ... Electric current (i.e., electrons) enters through the negatively charged electrode (cathode); components of the solution travel to this electrode, combine with the electrons, and are transformed (reduced)

Answer:

1- El uso óptimo de artefactos eléctricos en el hogar y el consumo de energía eléctrica tienen una relación de absoluto ligamen. Así, a mayor cuidado del consumo, y mejores los artefactos en su relación prestación/consumo, menor será el consumo de energía eléctrica en el hogar y, por ende, menor el gasto en el servicio.

2- El uso óptimo de energía eléctrica se explica a través de la física mediante el concepto de resistencia eléctrica, es decir, a mayor resistencia eléctrica, mayor será el consumo que el artefacto generará.

3- El consumo mensual de energía eléctrica se determina a través de la cantidad de kilovatios que cada hogar consume mensualmente. Así, a mayor cantidad de kilovatios (que es la unidad de medida de la energía eléctrica), mayor será el consumo.

4- El costo del servicio se valúa en función de los kilovatios consumidos en el periodo de medición. Así, cuando mayor sea el consumo mayor será el costo; incluso en algunos lugares, como Argentina, cuanto mayor sea el consumo de electricidad, mayor será el costo del kilovatio.

Answer:

c. h represents the total energy in a reaction

Answer:

B. It represents the heat involved in a reaction

Explanation:

It would make sense since most of the time h in chemistry

is the equivalent to heat.

I hope this helped you!

Answer:

Yea fs

Explanation:

Answer:

²³⁵₉₂U

Explanation:

The nuclear symbol of the nuclei is ²³⁵₉₂U.

The uranium nuclei has;

          mass number  = 235

          atomic number  = 92

To write the structure of the atom;

         The subscript before the symbol of the atom is the atomic number

        The superscript is the mass number

So;

      ²³⁵₉₂U is the symbol of the nuclei.

Answer:

300lb-ft/secs

Explanation:

Given parameters:

Weight of Peter = 100lb

Height of hill  = 6ft

Time taken  = 2s

Unknown:

Power output of Peter  = ?

Solution:

Power is the rate at which work is being done. It is expressed as;

     Power  = [tex]\frac{Work done }{time taken}[/tex]  

Work done  = force x distance = weight x height = 100lb x 6ft

 Work done  = 600lb-ft

   Power  = [tex]\frac{600}{2}[/tex]   = 300lb-ft/secs

Answer:

Answer option C: 300ft-lbs/sec is your answer

Answer:

Both

Explanation:

The combined gas law is also known as the general gas law.

From the ideal gas law we assume that n = 1;

So;

              PV  = nRT

 and then;

                  [tex]\frac{P_{1}V_{1} }{T_{1} }[/tex]  = [tex]\frac{P_{2}V_{2} }{T_{2} }[/tex]

   If we cross multiply;

                P₁V₁T₂   = P₂V₂T₁

  So;

         T₁ = [tex]T_{2} \frac{P_{1}V_{1} }{P_{2} V_{2} }[/tex]

Also;

         V₂  = [tex]V_{1} \frac{P_{1} T_{2} }{P_{2} T_{1} }[/tex]

So from the choices both are correct

Answer:

metallic bonds

Explanation:

in metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.

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Answer:

Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.

Explanation:

i mean there's alot of stuff that have Electromagnetic waves in it i mean alot!

The two examples of how energy from electromagnetic waves is used in technologies to do work are (i) For communication and radar radio waves are used. (ii) For cooking our food microwaves are used.

Electromagnetic waves are also called as EM waves are waves that are composed of vibrations between a magnetic field and an electric field. Electromagnetic wave are represented by a sinusoidal graph.

For communication and radar radio waves are used. For cooking our food microwaves are used. Infrared waves are used in remote controls. Mobile phones send microwave signals by the atmosphere.

Thus from the above conclusion we can say that The two examples of how energy from electromagnetic waves is used in technologies to do work are (i) For communication and radar radio waves are used. (ii) For cooking our food microwaves are used.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{5.7491 \times {10}^{25} }{6.02 \times {10}^{23} } \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

the first one Calories

Answer:Two metals that aren't magnetic are gold and silver.

Explanation:

Cobalt and nickel and El Fouladh

Answer:

All of the above

A person lifts up a box from the ground and places it on a shelf

Explanation:

Work done is the force applied on a body to move it through a particular distance or to cause displacement.

 Force applied which is the push or pull on a body is very important

 Distance or displacement which is the resultant length of path traveled by the body is key.

 Work done  = force x distance moved in the direction of the force

A person lifting a box is doing work.

Answer:

Explanation:

The number of molecules potassium chloride can be found by using the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 0.051 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer: 11 electrons

Explanation: The atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.

Answer:

Explanation:

the central part of an atom, composed of protons and neutrons

Answerhi

Explanation:

fhgh

Answer:

yyhhyvffcfcrfrcfcrfrfrfrc

Answer:

b

Explanation:

iron fillings are magnetic

Answer:

compound

Explanation:

Potassium iodide is a compound from the description given. The components of the compound is made up of elements and can only be broken down by chemical means.

When compounds are broken down they are made up of elements.

An

yedsdfsdfdsfsdfsd f sdf ssdf sdfsdf sd fsdf sd

Explanation:

Answer:

A body of air with horizontally uniform temperature, humidity, and pressure.

Explanation:

hope this helped :)

Explanation:

What type of floor. You have uploaded no image

Answer:

The colors are produced by heating metal salts, such as calcium chloride or sodium nitrate, that emit characteristic colors. List of colors and elements in Fireworks: Aluminum – Aluminum is used to produce silver and white flames and sparks.

Answer: Nitric acid is used in the production of ammonium nitrate and calcium ammonium nitrate which find applications as fertilizers. Ammonium nitrate is also used in the manufacturing of urea ammonium nitrate (UAN) used in fertilizer formulations and also as explosives.

Explanation:

We can see here that some common uses of nitric acid:

Nitric acid is a highly corrosive and strong mineral acid. It is a clear or yellowish liquid that is commonly used in various industrial, laboratory, and chemical applications.

In its pure form, nitric acid is a colorless liquid, but it can have a yellowish tint due to the presence of nitrogen dioxide, which forms when nitric acid reacts with air.

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Answer:

Viscous Drag.

Slab-Pull Force.

Ridge-Push Force

Explanation:

your welcome have a nice day

Answer:

c

Explanation:

Answer:

18 neutrons

Explanation:

In the element;

         ₁₇Cl

The number of electrons in the chlorine atom is 17.

The mass number of chlorine is 35.

  Mass number is the number of protons plus number of neutrons.

 Mass number  = Protons + neutrons

      Neutrons  = mass number  - protons

Number of protons in chlorine is 17;

 So;

         Neutrons   = 35 - 17  = 18

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{12.04 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{12.04}{6.02} \\ [/tex]

We have the final answer as

Hope you this helps you