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sergey [27]
3 years ago
10

Which of the following best defines the term oxidation state?

Chemistry
1 answer:
eimsori [14]3 years ago
4 0
C seems to be the best answer

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Which of the following best helps to why the value of Delta H degree for the CaF_2 in water in positive? A. CaF_2(s) is insolubl
FromTheMoon [43]

Answer: Option (C) is the correct answer.

Explanation:

A positive value of enthalpy or \Delta H means that energy is being absorbed from the surrounding. As CaF_{2} has strong ionic bonding between both calcium and fluorine atoms. So, to break their bond we need to provide energy to it.

So, when CaF_{2} is dissolved in warm water then warm water molecules will bombard with the stable bond of CaF_{2}. As a result, the energy will transfer from water to the bond in order to break it. And, due to loss in internal energy then there will be consequent lowering of temperature.

When this bond is broken down then the atoms will separates into gaseous ions and these ions will be then surrounded by the water molecules. As ithe bond between  CaF_{2} is very strong hence, its lattice energy will be very high.

Thus, we can conclude that the statement Ca^{2+} ions have very strong interactions with F^{-} ions in the crystal lattice, best helps to why the value of \Delta H degree for the CaF_{2} in water in positive.

7 0
3 years ago
What do you notice is different about the arrangement of the H 2 O molecules in solid form compared to the arrangement of molecu
Nonamiya [84]

Answer:

when the water is frozen, the molecules are tight and bunched together because its a solid. Although that the molecules seem to be tight, it does not meant that the molecules are not moving. The molecules in H 2 O solid form makes them move fast as in vibration. If the H 2 O was in liquid form, the molecules would be spread out and there would be plenty of room to move. But if the H 2 O is a gas, the molecules are even more loose that the liquid and they do whatever they choose to.

Explanation:

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How many Available electrons does CIO3, chlorate ion?
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For, ClO3- there are 26 valence electrons, so total pairs of electrons are 13.
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When the equation: __Fe2O3(s) + __CO(g) → __Fe(l) + __CO2(g) is correctly balanced using the smallest whole numbers, the coeffic
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The atmosphere is held together by
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Our atmosphere is a mixture of gases that surround Earth. It is kept in place by the pull of Earth's gravity. If Earth was a much smaller planet, like Mercury or Pluto, its gravity would be to weak to hold a large atmosphere.

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3 years ago
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