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kykrilka [37]
3 years ago
9

Why does the ice melt when you hold it in your hand? A.Heat is transferred from your hand to the ice cube. B.Heat from the ice c

ube is transferred to your hand. C.The ice cube radiates heat to your hand. D.Your hand transfers temperature to the ice cube.
Chemistry
1 answer:
Thepotemich [5.8K]3 years ago
3 0
A. Heat is transferred from your hand to the ice cube.
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A gas has a pressure of 7.01 atm at 227°C. What will its temperature be if the pressure is increased to 12.1 atm and volume is h
kirill [66]

Answer:

The temperature of the gas will be 590.05 C.

Explanation:

Gay-Lussac's law can be expressed mathematically as follows:

\frac{P}{T} =k

Where P= Pressure, T = temperature, K = Constant

This law indicates that the ratio between pressure and temperature is constant.

This law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of shocks against the walls increases, that is, the pressure increases. That is, the gas pressure is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the gas pressure increases. And when the temperature decreases, gas pressure decreases.

It is desired to study two different states, an initial state and an final state. You have a gas that is at a pressure P1 and at a temperature T1 at the beginning of the experiment. When the temperature varies to a new T2 value, then the pressure will change to P2, and the following will be true:

\frac{P1}{T1} =\frac{P2}{T2}

In this case:

  • P1= 7.01 atm
  • T1= 227 C= 500 K (being 0 C= 273 K)
  • P2= 12.1 atm
  • T2= ?

Replacing:

\frac{7.01 atm}{500 K} =\frac{12.1 atm}{T2}

Solving:

T2=12.1 atm*\frac{500 K}{7.01 atm}

T2= 863.05 K= 590.05 C

<u><em>The temperature of the gas will be 590.05 C.</em></u>

<u><em> </em></u>

<u><em></em></u>

6 0
3 years ago
A soda is made of 5% CO2 gas, 10% powdered drink mix, and 80% water.
Aleonysh [2.5K]

Answer:

Water is a solvent, and CO2 gas and the powdered drink mix are both solutes.

Explanation:

In order to successfully answer this question, we need to remember that solutions consist of solutes and solvents.

Solutes are components of solutions that are dissolved (typically ionic salts if we have a polar solvent), while solvents are fluids (usually liquids) that provide a medium for the solutes to dissolve (water is the most common polar solvent for ionic salts, for example).

As a general rule, solvent is used in great excess, that is, it makes the greatest percentage in terms of mass of a particular solution.

Applying the theory above for this problem, notice that the greatest percentage of this solution belongs to water, besides, water is a common solvent in general. Thus, it is our solvent.

Also, solution would only have one solvent and one or several solutes. This leaves the two other components, carbon dioxide and powdered drink mix, as our solutes, as they have a lower percentage than our solvent.

8 0
4 years ago
How many grams of N2 gas are present in 1.13 L of gas at 2.09 atm and 291 K?
solong [7]

Answer:

Mass= 2.77g

Explanation:

Applying

P=2.09atm, V= 1.13L, R= 0.082, T= 291K, Mm of N2= 28

PV=nRT

NB

Moles(n) = m/M

PV=m/M×RT

m= PVM/RT

Substitute and Simplify

m= (2.09×1.13×28)/(0.082×291)

m= 2.77g

6 0
3 years ago
In any electromagnetic wave, A) both the energy and the wave travel in the same direction. B) only the oscillating electric fiel
KengaRu [80]
<span>I believe the answer is letter c. haf energy is carried by the electric field hand half is carried by a magnetic field. the movements are in travelling in a perpendicular movement, a kind of x and y axis that creates oscillation producing electric fields. The effect can make magnet out of electricity.</span>
3 0
4 years ago
Read 2 more answers
What element has 81 protons in the nuclei of its atoms?
WITCHER [35]
Thallium has got 81 protons

<u>Have a nice days.......</u>
7 0
3 years ago
Read 2 more answers
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