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3 years ago

Calculate the heat that must be supplied to

Chemistry

1 answer:

Marat540 [252]3 years ago

5 0

Answer:

Q must be supplied = 119523.3~J

Explanation:

The law of conservation of energy can be applied to heat changes, i.e. the heat received/absorbed is the same as the heat released

Q in = Q out

Heat can be calculated using the formula:

Q = mc∆T

Q = heat, J

m = mass, g

c = specific heat, joules / g ° C

∆T = temperature difference, ° C / K

So from the question :

Q to the system(Q supplied) = Q water + Q steel vessel(Q gained)

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A light strikes the boundary of a medium at a 45 degree angle. Instead of entering the second medium, the light reflects back in

Dahasolnce [82]

Answer:

D It must be equal to 1.00

Explanation:

The refraction in the second medium must be equal to 1. The refraction index is given as the ration of the angle of incidence to the angle of refraction. This is given as a fraction. In other words:

$\frac{sin\theta _{i} }{sin\theta _{r} } = n$

where Θ₁ and Θ₂ are angles of incidence an refraction, and n is the refractive index.

At a critical angle, the refraction is equal to the reflection inside the medium. This results in a phenomenon called total internal reflection where light is reflected internally in the medium.

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3 years ago

What theory states that the particles of a gas are in constant random motion and that they constantly collide with each other an

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The Kinetic Molecular Theory has 5 main tenets, and they basically explain that the gas molecules are in constant motion. It is random and it causes constant collisions between the particles and also with the container's walls.

So, the answer is B. Kinetic Molecular Theory.

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1 year ago

The chemical formula for emerald is Be3Al2(SiO3)6. An emerald can be described as

uysha [10]

Answer:

An emerald can be described as a pure substance because it is a compound. it's a pure substance because it is an element. It's an impure substance because it is chemically combined, an impure substance because it is a mixture.

Explanation:

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3 years ago

Read 2 more answers

Cohesion, adhesion, and surface tension are characteristics of water that ________. increase when pH increases increase when tem

Ray Of Light [21]

Answer:

are a result of hydrogen bonding.

Explanation:

The surface tension is the amount of energy required to stretch or increase the surface of a liquid by a unit area. Liquids that have strong intermolecular forces also have high surface tensions. Thus, because of hydrogen bonding, water has a considerably greater surface tension than most other liquids.

Another example of surface tension is capillary action. A thin film of water adheres to the wall of the glass tube. The surface tension of water causes this film to contract, and as it does, it pulls the water up the tube. Two types of forces bring about capillary action.

One is cohesion, which is the intermolecular attraction between like molecules (in this case, the water molecules). The second force, called adhesion, is an attraction between unlike molecules, such as those in water and in the sides of a glass tube. If adhesion is stronger than cohesion, the contents of the tube will be pulled upward. This process continues until the adhesive force is balanced by the weight of the water in the tube.

This characteristics of water are a consequence of a particularly strong type of intermolecular attraction, called the hydrogen bond, which is a special type of dipole-dipole interaction between the hydrogen atom in a polar bond, such as N-H, O-H, or F-H, and an electronegative O, N, or F atom.

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3 years ago

The first step in the two-step process of making a solution is the breakdown of the solute source into ____________."

Troyanec [42]

<h3>Answer;</h3>

Atomic particles

The first step in the two-step process of making a solution is the breakdown of the solute source into atomic particles.

<h3>Explanation;</h3>

Solution is a homogeneous mixture of two or more substances uniformly dispersed throughout a single phase
The liquid component that makes up the largest part of a solution is called the solvent, and the substance that is dissolved is called the solute.
Unsaturated Solution is a solution that contains less solute than a saturated solution does and that is able to dissolve additional solute, while saturated Solution is a solution that cannot dissolve any more solute under the given conditions

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3 years ago