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pantera1 [17]
2 years ago
13

Please help me please

Chemistry
1 answer:
Brut [27]2 years ago
6 0

I am only in 6th grade so all I have to say is good luck and I wish you the best on that quiz.

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The temperature in a beaker of water is 50 degrees Celsius. Kiley puts the water into a freezer. After a few minutes, she measur
Vlad1618 [11]

Answer:

This question lacks options; the options are:

A) They moved more freely

B) They moved closer together.

C) The average speed increased.

D) The average kinetic energy increased

The answer is B

Explanation:

The water in the beaker is described to be in a liquid state of matter. Its temperature decreases from 50°C to 10°C when placed in a freezer by Kiley. This means that heat is gradually being lost as the liquid water undergoes freezing into a solid state.

When water in a liquid state is freezed, it's molecules, which were moving more freely begin to move closer together because the speed at which the particles in the liquid state moved has been reduced.

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3 years ago
At 3pm a dry-bulb thermometer reading is 66F the wet-bulb reading is 66F what is the relative humidity explain? Plzzzz help <
BARSIC [14]

Answer:

100 %

Explanation:

<em>Relative humidity</em> (RH) is the amount of water vapour in the air compared to the maximum amount it can hold, expressed as a percentage.

RH is measured by a device that has wet- and dry-bulb thermometers.

If the air is unsaturated, water will evaporate from the wet bulb and cool it. The wet-bulb temperature will be less than that of the dry bulb.

If the wet-bulb temperature is the same as the dry-bulb temperature, it means that water cannot evaporate from the wet bulb.

The atmosphere already holds as much water as it possibly can, so the relative humidity is 100 %.

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3 years ago
What is the function of the system shown in the diagram?
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Answer:

the answer is carrying oxygenated blood and nutrients to cells

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3 years ago
What the requirement for a reversible reaction to be at equilibrium ?
lana66690 [7]
<span>A reversible reaction is a chemical change in which the products can be converted back to the original reactants under suitable conditions.</span><span> In a reversible reaction, changing the reaction conditions e.g. concentration, pressure or temperature will change the net direction the reaction goes i.e. more to the right (forward) or more to left (backward).<span>It also means a reversible reaction does not go to completion in either direction and all components, original reactants or ensuing products, ALL co-exist in the reaction mixture (see notes on chemical equilibrium).</span></span><span><span>This means the reaction can go in either direction i.e.</span><span> <span>A + B ==> C + D or C + D ==> A + B</span></span></span><span><span>A reversible reaction is shown by the sign ,</span><span> <span>a half-arrow to the right (direction of forward reaction), </span><span>and a half-arrow to the left (direction of backward reaction).</span><span>It is really important you understand that the terms right & left AND forward & backward are used in the context of how the equation is presented.</span></span></span><span><span>Most reactions are not reversible (irreversible) and have the usual complete arrow only pointing to the right.</span>
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Help with Standard Enthalpy Change Calculation?
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We substitute the enthalpies for the reactants in the equation:
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