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Alex_Xolod [135]
3 years ago
7

4. The heat of

Chemistry
1 answer:
Reika [66]3 years ago
8 0

It is 2 KJ

It is because the formula is :

q=m∆Hf

where m is the mass and ∆Hf is the heat fusion.

So, we get:

q=80×25

q=2000J or 2 KJ

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I had 10 molecules of Ag and an unlimited supply of H2S. How many molecules of Ag2S could I produce?
rjkz [21]

Answer:

5.12 molecules of Ag₂S could be produced from 10 molecules of silver.

Explanation:

Given data:

Molecules of Ag = 10 molecules

Molecules of Ag₂S = ?

Solution:

First of all we will convert the number of molecules into gram.

10/ 6.022 ×10²³ = 1.7 × 10⁻²³ mol

Mass of Ag:

Number of moles = mass/ molar mass

Mass = Number of moles × molar mass

Mass = 1.7 × 10⁻²³ mol × 107.9 g/mol

Mass = 183.43 × 10⁻²³ g

Chemical equation:

2Ag  + H₂S  →  Ag₂S + H₂

Now we will compare the moles of silver with Ag₂S from balanced chemical equation.

         Ag           :         Ag₂S

          2             :          1

     1.7 × 10⁻²³    :          1/2 ×1.7 × 10⁻²³  = 0.85 × 10⁻²³ mol

Molecules of Ag₂S:

0.85 × 10⁻²³ × 6.022 ×10²³ = 5.12 molecules

5 0
3 years ago
The following substances dissolve when added to water. Classify the substances according to the strongest solute-solvent interac
Montano1993 [528]

Answer: HF-dipole- dipole interaction

CH3OH- dipole-dipole interaction

CaCl2- ion-ion interaction

Explanation:

Both CH3OH and HF possess permanent dipoles which interact with water leading to the dissolution of the above named substances. Remember that water also possesses a permanent dipole. Which can interact with the dipoles on other polar molecules. CaCl2 is purely ionic and interacts with water via ion-dipole mechanism.

8 0
4 years ago
What components of static electricity theory does Electrostatic Precipitator make use of
Ivenika [448]

Answer:

Electrostatic smoke precipitators work by forcing dirty flue gas (the gas escaping from a smokestack) past two electrodes (electrical terminals), which take the form of metal wires, bars, or plates inside a pipe or smokestack

Explanation:

7 0
3 years ago
What is the difference between S-32 and S-36?
Blizzard [7]

Answer:

its easy ask to chrome or search in yt ;)

8 0
3 years ago
A 15.0 L tank of gas contained at a high pressure of 8.20 • 10^4 torr. The tank is opened and the gas expands into an empty cham
Kay [80]

Answer:

P₂ = 0.205torr

Explanation:

Boyle's law relates the pressure and volume of a gas under two different conditions. The equation is:

P₁V₁ = P₂V₂

<em>Where P is pressure and V volume of of 1, initial conditions and 2, final conditions.</em>

P₂ is our incognite

Replacing:

P₁V₁ = P₂V₂

8.20x10⁴torr*15.0L = P₂*600x10⁴L

<h3>P₂ = 0.205torr</h3>

<em />

4 0
3 years ago
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