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3 years ago

5. Hydrogen chloride can be obtained by reacting phos-

Chemistry

1 answer:

mote1985 [20]3 years ago

7 0

Answer:

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Explanation:

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How to determine molecular formula based on spectroscopic data?

mart [117]

Answer:

When trying to determine the structure of a compound based on its molecular formula, you can use NMR (nuclear magnetic resonance) and IR (infrared) spectroscopy to help you identify the fragments of the molecule. (Once you identify these fragments, you can identify the molecule’s structure.)

4 0

3 years ago

Calculate the value of Key in the following reaction if the equilibrium concentrations are

MAXImum [283]

Answer:

The value of the equilibrium constant Kc is 5.45

Explanation:

The "Law of Mass Action" states:

"For a reversible reaction in chemical equilibrium at a given temperature, it is true that the product of the concentrations of the products raised to the stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is a constant."

This constant was called the equilibrium constant. For a reaction:

aA + bB ⇄ cC + dD

the equilibrium constant Kc is:

$Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }$

In this case, the balanced reaction is:

2 H₂S → 2 H₂ + S₂

So, the equilibrium constant Kc is:

$Kc=\frac{[H_{2} ]^{2} *[S_{2} ] }{[H_{2} S]^{2} }$

The equilibrium concentrations are

[H₂S] =0.25 M
[H₂]= 0.88 M
[S₂]= 0.44M

Replacing in the definition of equilibrium constant:

$Kc=\frac{(0.88 M)^{2} *0.44 M }{(0.25 M)^{2} }$

Solving:

Kc= 5.45

The value of the equilibrium constant Kc is 5.45

7 0

3 years ago

What physical property makes metal pot good for cooking

inn [45]

It's a conductor meaning metal is good for radiating heat.

5 0

3 years ago

Which property of water causes water drops to bead on a freshly waxed car?

astraxan [27]

Answer:

Cohesive forces are greater than adhesive forces

Step-by-step explanation:

The attractive forces between water molecules and the wax on a freshly-waxed car (adhesive forces) are quite weak.

However, there are strong attractive forces (cohesive forces) between water molecules.

The water molecules are only weakly attracted to the wax, so the cohesive forces pull the water molecules together to form beads .

3 0

3 years ago

Select all that are true

kipiarov [429]

I think it’s B not quite sure ! Sorry

8 0

3 years ago