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nikdorinn [45]
2 years ago
12

Can someone help me PLEASE

Chemistry
1 answer:
AVprozaik [17]2 years ago
3 0
Lattice energy k bye
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If you multiply an objects weight times it height, what value do you compute?
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It might calculate the volume, but you need the length as well, depending on the object.
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Atomic Radius________across (left to right) a period and______down a group.
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Answer: Decreases across the period and increases down the group

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In the reaction of chlorine with calcium, explain which atom is oxidized.
romanna [79]

Answer:

The atom is oxidized is Ca.

Explanation:

  • The oxidation-reduction reaction contains a reductant and an oxidant (oxidizing agent).
  • The oxidation process is the process in which electrons are lost and produce positively charged ions.
  • The reduction process is the process in which electrons is gained and negatively charge ions are produced.

  • In the reaction of chlorine with calcium:

<em>Ca + Cl₂ → CaCl₂,</em>

Ca loses 2 electrons and is oxidized to Ca²⁺. (Ca <em>→</em> Ca²⁺ + 2e).

Cl is gains 2 electrons in "Cl₂, oxidation state zero" and is reduced to Cl⁻. (Cl₂ + 2e <em>→</em> 2Cl⁻).

5 0
3 years ago
A substance releases 2,192 J of heat, changing its temperature from 50 degrees C to 5 degrees C. The mass of the substance is 73
Gre4nikov [31]

The specific heat capacity of the given substance is -0.66 J/g°C.

<u>Explanation:</u>

The heat absorbed by any substance is the product of its mass, specific heat capacity and change in temperature.

q = m × c × ΔT

m is the mass in grams

q = amount of heat released or absorbed in J

ΔT = change in temperature in °C = 5 -50 = -45°C

c = specific heat capacity in J/g°C

c = $\frac{q}{m \times dT}

Plugin the values, we will get,

c = $\frac{2192 }{73.9 \times-45}

= -0.66 J/g°C

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How many electrons elements are present in period 2 ?​
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There are Eight elements
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