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Veronika [31]
3 years ago
13

Help

Chemistry
1 answer:
Rudik [331]3 years ago
7 0

Answer: One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.

Explanation: I hoped that helped!

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As you go down a family or group on the periodic table *
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Answer:

The elements become less reactive.

Explanation:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction and reactivity increases because of greater electron affinity.

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased. The electron affinity decreases because of shielding effect and thus atom become less reactive.

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How do you convert volume to moles at STP?
Vanyuwa [196]

The conversion of volume to moles at STP is 1 mole.

The ideal gas equation is given as :

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At STP , the pressure is 1 atm and the temperature is 273.15 K, the volume At STP is 22.4 L.

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n = ( 1 × 22.4 ) / (0.0823 × 273.15)

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Thus, at STP , the number of moles is 1 mol.

To learn more about moles here

brainly.com/question/8429153

#SPJ4

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