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4 years ago

Energy is released during which phase changes?

Chemistry

1 answer:

enyata [817]4 years ago

3 0

Answer:

There are two phase changes where the heat energy is released: Condensation: When gas condenses to liquid the quantity of energy converted from chemical to heat is called the Heat of Vaporization or Δ Hvap .

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Which branch of chemistry studies substances containing carbon?

raketka [301]

Explanation:

Organic........you cholo

6 0

4 years ago

The atomic radii of a divalent cation and a monovalent anion are 0.62 nm and 0.121 nm, respectively. (a) Calculate the force of

Zepler [3.9K]

Answer:

$\boxed{8.4\times 10^{-10} \text{ N}}$

Explanation:

The formula for the force exerted between two ions is

$F = \dfrac{kq_{1}q_{2}}{r^{2}} = \dfrac{kz_{1}z_{2}e^{2}}{r^{2}}$

where the Coulomb constant

k = 8.988 × 10⁹ N·m·C⁻²

Data:

z₁ = +2; r₁ = 0.62 nm

z₂ = -1; r₂ = 0.121 nm

Calculations:

r = r₁ + r₂ = 0.62 + 0.121 = 0.741 nm

$F =\dfrac{8.988 \times 10^{9} \text{ N $\cdot$ m$^{2} \cdot$ C$^{-2}$} \times 2 \times (-1) \times ( 1.602 \times 10^{-19} \text{ C})^{2}}{(0.741 \times 10^{-9} \text{ m})^{2}}\\\\ = -\mathbf{8.4\times 10^{-10}} \textbf{ N}\\\text{The attractive force between the ions is } \boxed{\mathbf{8.4\times 10^{-10}} \textbf{ N}}$

3 0

3 years ago

Conservation of Mass - Combustion

Rashid [163]

Answer:

i think its b

Explanation:

3 0

3 years ago

Read 2 more answers

When a galvanic cell is comprised of an anode and a cathode of precisely the same material, this is called a(n):

Cloud [144]

Answer:

Concentration cell

Explanation:

Galvanic cells and even electrolytic cells usually consist of two electrodes namely anode and cathode. These 2 electrodes can either be made of the same metals or different metals, and also an electrolyte whereby the two electrodes are immersed.

Now, in the case where the electrodes are made of the same metal, we call it a concentration cell because A concentration cell is a cell that consists of two half-cells that have the same electrodes, but yet differ in concentrations.

3 0

3 years ago

Gaseous compound Q contains only xenon and oxygen. When 0.100 gg of Q is placed in a 50.0 mLmL steel vessel at 0 ∘C∘C, the press

asambeis [7]

The question is incomplete, here is the complete question:

Gaseous compound Q contains only xenon and oxygen. When a 0.100 g sample of Q is placed in a 50.0-mL steel vessel at 0°C, the pressure is 0.229 atm. What is the likely formula of the compound?

A. XeO

B. $XeO_4$