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Stolb23 [73]
3 years ago
12

Why does silver gate tarnish on exposed to air

Chemistry
2 answers:
Lelu [443]3 years ago
7 0

Answer:

when silver articles exposed to air silver racts with Sulphur present in the atmosphere and form a black layer of silver sulphide on the surface. copper articles get tarnished by reacting with air and water. due to this, a layer is formed over copper vessels.

stich3 [128]3 years ago
6 0

Explanation: When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish If a silver object is to be kept from tarnishing, it must be protected from sulfur-containing gases.

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Place the following compounds in order of increasing strength of intermolecular forces. HF H2 CH3Cl
Scorpion4ik [409]

Answer:

H2 < CH3Cl < HF

Explanation:

The intermolecular forces are the forces that bond the molecules together in a substance. There are three types of these forces:

  1. Dipole induced -dipole induced, or London dispersion -> Is the weakest and is presented in nonpolar molecules, in which a dipole is induced and so the molecules are joined together;
  2. Dipole-dipole -> Is stronger than the London dispersion and occurs in a polar molecule. In this case, the dipole already exists (partial positive and negative charges), so the poles are attracted;
  3. Hydrogen bond -> It's the strongest and is formed when the hydrogen is bonded with a higher electronegativity element (F, O, and N).

So, the molecule of H2 is linear and formed by the same element, so, is nonpolar, and has London dispersion forces. The molecule of CH3Cl has 3 nonpolar bonds (C-H), and one polar bond (C-Cl), so it's polar and has dipole-dipole forces. And the HF molecule has hydrogen bonds.

*A polar bond is a bond formed by elements with different electronegativities.

3 0
3 years ago
g At elevated temperatures, molecular hydrogen and molecular bromine react to partially form hydrogen bromide: H 2 (g) Br 2 (g)
oksano4ka [1.4K]

Answer: At equilibrium , there are 0.274 moles of Br_2

Explanation:

Moles of  H_2 = 0.682 mole

Moles of  Br_2 = 0.440 mole

Volume of solution = 2.00 L

Initial concentration of H_2 = \frac{0.682}{2.00}=0.341 M

Initial concentration of Br_2 =  \frac{0.440}{2.00}=0.220 M

Equilibrium concentration of H_2 = \frac{0.516}{2.00}=0.258 M

The given balanced equilibrium reaction is,

             H_2(g)+Br_2(g)\rightleftharpoons 2HBr(g)

Initial conc.   0.341 M    0.220 M        0 M    

At eqm. conc.   (0.341-x) M   (0.220-x) M   (2x) M

Given : (0.341-x) M = 0.258 M

x= 0.083 M

Thus equilibrium concentartion of Br_2 = (0.220-0.083) M = 0.137 M

Thus moles of Br_2 at equilibrium = 0.137M\times 2.00L=0.274mol

At equilibrium , there are 0.274 moles of Br_2

8 0
3 years ago
Y = 57.15 − 0.5 X If Y equals 5 , what is X ?<br><br> Then is Y=3, what is X?
Fiesta28 [93]

When y equals 5, x is 104.3

When y equals 3 then x is 108.3

<em><u>Solution:</u></em>

<em><u>Given expression is:</u></em>

y = 57.15 - 0.5x

<h3><u>If y equals 5 what is x ?</u></h3>

Substitute y = 5 in given expression

5 = 57.15 - 0.5(x)

5 = 57.15 - 0.5x

0.5x = 57.15 - 5

0.5x = 52.15

Divide both sides by 0.5

x = 104.3

Thus when y equals 5, x is 104.3

<h3><u>If y = 3 what is x ?</u></h3>

Substitute y = 3 in given expression

3 = 57.15 - 0.5(x)

3 = 57.15 - 0.5x

0.5x = 57.15 - 3

0.5x = 54.15

Divide both sides by 0.5

x = 108.3

Thus when y equals 3 then x is 108.3

7 0
4 years ago
Question 1 (1 point)
Setler79 [48]

Answer:

.5

Explanation:

5 0
3 years ago
Read 2 more answers
When comparing a plant cell to an animal cell, only the plant cell will contain
Travka [436]

Answer:

A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.

Explanation:

6 0
3 years ago
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