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2 years ago

Given the reaction: cu(s) + 4hno3(aq) → cu(no3)2(aq) + 2no3(g) + 2h2o(l )as the reaction occurs, what happens to copper?

1 answer:

6 0

From the reaction between Cu and HNO₃, the formed gas is NO₂ instead of NO₃. Hence the correct balanced equation would be,
Cu(s) + 4HNO₃(aq) → Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O(l)

Here, Cu goes to Cu(NO₃)₂ by changing its oxidation number from 0 to +2 while NO₃⁻ goes to NO₂ by reducing its oxidation state from +5 to +4 . Hence Cu is oxidized by HNO₃ in the reaction.

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The partial pressures in an equilibrium mixture of NO, Cl2, and NOCI at 500 K are as follows: PNo = 0.240 atm, Pel2 = 0.608 atm,

maxonik [38]

Answer : The value of $K_p$ at temperature 500 K is 52.0

Explanation : Given,

Partial pressure of $NO$ at equilibrium = 0.240 atm

Partial pressure of $Cl_2$ at equilibrium = 0.608 atm

Partial pressure of $NOCl$ at equilibrium = 1.35 atm

The balanced equilibrium reaction is,

$2NO(g)+Cl_2(g)\rightleftharpoons 2NOCl(g)$

The expression of equilibrium constant $K_p$ for the reaction will be:

$K_p=\frac{(p_{NOCl})^2}{(p_{NO})^2(p_{Cl_2})}$

Now put all the values in this expression, we get :

$K_p=\frac{(1.35)^2}{(0.240)^2(0.608)}$

$K_p=52.0$

Therefore, the value of $K_p$ at temperature 500 K is 52.0

3 0

2 years ago

1. Electronegativity is the… a. amount of energy required to remove the most loosely bound electron from an atom. b. tendency of

Kitty [74]

Answer: C.

ability of an atom to attract an electron from another atom toward itself.

Explanation:

Electronegativity is the chemical property that describes the ability of an atom to attract electron to itself. It is responsible for bond formation between atoms.

8 0

2 years ago

Read 2 more answers

Movement of the ___ creates the London dispersion forces.

Tanzania [10]

Answer: electrons

Explanation: moving electrons cause momentarily charge

Distribution on molecule. This distribution induces similar distribution to

Adjacent molecule.

7 0

2 years ago

Hafnium has six naturally occurring isotopes: 0.16% of 174Hf, with an atomic weight of 173.940 amu; 5.26% of 176Hf, with an atom

ser-zykov [4K]

Answer:

177.277amu

Explanation:

the total occuring isotopes for Hafnium is =6.

First isotope had an atomic weight of 173.940amu

Second isotope =175.941amu

Third isotope =176.943amu

Fourth isotope=177.944amu

Fifth isotope. =178.946amu

sixth isotope .179.947amu

Average atomic weight of Hafnium= sum of all the atomic weights of the isotopes/ Total occuring isotopes

Thus, 173.940amu+175.941amu+176.943amu+177.944amu+178.946amu+179.947amu.= 1063.661amu

Average atomic weight= 1063.661amu /6 = 177.2768333amu

= 177.277amu to 3 decimal places.

6 0

2 years ago

What type of bond joins the carbon atom to each of the hydrogen atoms? A molecule that consists of four hydrogen atoms and one c

Len [333]

Answer:

Explanation:

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2 years ago