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Studentka2010 [4]
3 years ago
15

What problems might happen if an unnecessary hurricane warning was issues

Chemistry
1 answer:
deff fn [24]3 years ago
4 0
People would rush to the store to buy supplies and there might not be enough for the "last minute noticed" people
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Consider the two electron arrangements for neutral atoms A and B. What is the atomic number of B? A - 1s2, 2s2, 2p6, 3s1 B - 1s2
Y_Kistochka [10]

Answer: atomic number is 37.

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3 years ago
Using the diagram above answer the following questions:
Bas_tet [7]

A) solid

B) liquid

C) gas

D) Shows the temperature and pressure conditions under which a solid water and water vapor can co exist

E) liquid

8 0
4 years ago
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what is the volume of aluminum with the mass of 0.85g
Mrrafil [7]

Answer:

If the mass of a sample of aluminum foil is known, then it is possible to calculate the volume of the foil. In general volume is the product of length times width times height of an object. If we know the length and width of a piece of foil, we can then determine its height, or thickness.

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3 0
3 years ago
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Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the freezing of water, and ex
Dafna11 [192]

Answer:

Explanation:

The total energy or intrinsic energy of a system is called the enthalpy. In thermochemistry, we have two types of enthalpy changes which are:

  • Exothermic changes
  • Endothermic changes

For the freezing of water, the enthalpy change is an exothermic one. Exothermic changes are designated as negative. In this chemical change, heat is liberated to the surroundings and this leaves the environment at a much higher temperature. In freezing, the enviroment gains more heat as the material begins to cool to lower temperature.

Entropy is the degree of randomness or disorderliness of a system. When a phase change occurs from liquid to solid, freezing takes place. Such a change increases the orderliness of a system and entropy diminishes. Here, entropy is negative.

The free energy is a measure of the energy a system that does useful work. Free energy depends on enthalpy, entropy and temperature of a system. For phase changes such as freezing of water, the value of free energy change is 0.

For this process, an increases in temperature makes it non-spontaneous. Increasing temperature would alter the course of the reaction and makes it exothermic. For entropy, increasing temperature would increase entropy and therefore, the reaction would not be feasible.

Temperature would mostly affect the free energy. An increase in temperature would increase the value of entropy change and the reaction would not be spontaneous. With falling temperature value, the reaction becomes more spontaneous and favored.

8 0
3 years ago
Why are supergiant so bright?
Yuliya22 [10]

Because supergiants are so massive, the core temperature gets much hotter than in giants, so supergiants can fuse elements heavier than hydrogen and helium. But to support their tremendous mass, supergiants burn up their fuel much more quickly.

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3 years ago
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