Complete and balance the following reactions ?<br> uo^2+ +cr2o^2-7 ــــــــــــــــ uo2+ +cr3+

The ΔG°f of atomic oxygen is 230.1 kJ/mol. Find ΔG° for the following dissociation reactionO2 (g) <--> 2O (g)then calculat

marusya05 [52]

Answer:

Kc = 2.145 × 10⁻⁸¹

Explanation:

Let's consider the following reaction:

O₂(g) ⇄ 2O(g)

The standard Gibbs free energy for the reaction (ΔG°) can be calculated using the following expression:

ΔG° = Σnp. ΔG°f(p) - Σnp. ΔG°f(p)

where,

ni are the moles of products and reactants

ΔG°f(p) are the standard Gibbs free energy of formation of products and reactants

In this case,

ΔG° = 2 × ΔG°f(O) - 1 × ΔG°f(O₂)

ΔG° = 2 × 230.1 kJ/mol - 1 × 0 kJ/mol

ΔG° = 460.2 kJ/mol

With this information, we can calculate the equilibrium constant (Kc) using the following expression:

$Kc=e^{-\Delta G \°/R.T } = e^{-460.2 kJ/mol/(8.314 \times 10^{-3}kJ/mol.K) \times 298K }=2.145 \times 10^{-81}$

3 0

3 years ago

Please help me I've been crying for hours trying to figure this out. I don't have any materials to even complete this lab!!! If

Brums [2.3K]

Hi buddy! Sadly the picture isnt loading mind resendig it?

8 0

2 years ago

To measure the amount of nickel in some industrial waste fluid, an analytical chemist adds 0.110 M sodium hydroxide (NaOH) solut

Ilia_Sergeevich [38]

Answer:

This is a precipitation reaction in which Ni(OH)₂ precipitates.

8.68%

Explanation:

Let's consider the following reaction.

Ni²⁺(aq) + 2 NaOH(aq) ⇄ Ni(OH)₂(s) + 2 Na⁺(aq)

This is a precipitation reaction in which Ni(OH)₂ precipitates.

We can establish the following relations:

The molar mass of Ni(OH)₂ is 92.71 g/mol.
1 mole of Ni(OH)₂ is produced per 1 mole of Ni²⁺.
The molar mass of Ni²⁺ is 58.69 g/mol.

When 343 mg (0.343 g) of Ni(OH)₂ are collected, the mass of Ni²⁺ that reacted is:

$0.343gNi(OH)_{2}.\frac{1molNi(OH)_{2}}{92.71gNi(OH)_{2}} .\frac{1molNi^{2+} }{1molNi(OH)_{2}} . \frac{58.69gNi^{2+}}{1molNi^{2+}} =0.217gNi^{2+}$

The mass percent of nickel in the 25.0g-sample is:

$\frac{0.217g}{2.50g}.100\%=8.68\%$

8 0

3 years ago

Which elements would have properties similar to those of boron (B) ? Se , Li , and Be Al , Ga , and In C, N, and O Na , Mg , and

n200080 [17]

Answer:

option B= Al, Ga and In

Explanation:

Properties of Boron group:

These elements are belongs to boron group which is thirteen group of periodic table. There are six elements are in this group boron, aluminium, gallium, indium, thallium and nihonium.
They are also called p-block elements because their valance electrons are present in p subshell.
All these elements have three valance electrons.
Boron is metalloid while other elements are metals.
Their oxidation state is +3 because of tendency to lose three valance electrons and create positive charge.
Their atomic sizes increases down the group with increase of atomic number.
Their ionization energies decreases down the group because of increase of atomic radius and ease of removing of electrons.

8 0

3 years ago

How does symmetry extend to our senses

VladimirAG [237]

One way is, we as humans find seminary attractive because it indicates the person has good genes.

8 0

3 years ago

Complete and balance the following reactions ? uo^2+ +cr2o^2-7 ــــــــــــــــ uo2+ +cr3+