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2 years ago

What is the formula of a compound formed between nitrogen (N) and barium (Ba)?

Chemistry

2 answers:

Nikitich [7]2 years ago

7 0

Answer:

Ba3N2

Explanation:

Barium is a metal element and Nitrogen is a non-metal element, so they forme an ionic compound. To make the formula of an ionic compound, first we need to see the valence of the atoms, that is, how much electrons it can donate or it has to gain to have 8 electrons in the valence layer (octet rule).

Barium is in the family 2, so it has two electrons in its valence layer, so it must donate these two electrons; Nitrogen is in the family 15, so it has 5 electrons ins its valence layer and must gain 3 electrons.

Writing the ions they must form:

$Ba^{+2} N^{-3}]$

First came the cation (positive charge), then the anion (negative charge), and the charges must change between them, without the signal, and will inform how many atoms are necessary of which element:

Ba3N2

ANEK [815]2 years ago

4 0

The formula of a compound formed between nitrogen (N) and barium (Ba) is BARIUM NITRIDE Ba3N2.
3Ba + N2 ------> Ba3N2

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An ideal gas contained in a piston-cylinder assembly is compressed isothermally in an internally reversible process.

Tju [1.3M]

Answer:

a) $\Delta S$

b) entropy of the sistem equal to a), entropy of the universe grater than a).

Explanation:

a) The change of entropy for a reversible process:

$\delta S=\frac{\delta Q}{T}$

$\Delta S=\frac{Q}{T}$

The energy balance:

$\delta U=[tex]\delta Q- \delta W$

If the process is isothermical the U doesn't change:

$0=[tex]\delta Q- \delta W$

$\delta Q= \delta W$

$Q= W$

The work:

$W=\int_{V1}^{V2}P*dV$

If it is an ideal gas:

$P=\frac{n*R*T}{V}$

$W=\int_{V1}^{V2}\frac{n*R*T}{V}*dV$

Solving:

$W=n*R*T*ln(V2/V1)$

Replacing:

$\Delta S=\frac{n*R*T*ln(V2/V1)}{T}$

$\Delta S=n*R*ln(V2/V1)}$

Given that it's a compression: V2<V1 and ln(V2/V1)<0. So:

$\Delta S$

b) The entropy change of the sistem will be equal to the calculated in a), but the change of entropy of the universe will be 0 in a) (reversible process) and in b) has to be positive given that it is an irreversible process.

7 0

3 years ago

How do I complete this column graph of the number of conductors vs the number of insulators

Vikentia [17]

Answer:

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Explanation:

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2 years ago

(Thermodynamics)

frutty [35]

Answer:

3853 g

Step-by-step explanation:

M_r: 107.87

16Ag + S₈ ⟶ 8Ag₂S; ΔH°f = -31.8 kJ·mol⁻¹

1. Calculate the moles of Ag₂S

Moles of Ag₂S = 567.9 kJ × 1 mol Ag₂S/31.8kJ = 17.858 mol Ag₂S

2. Calculate the moles of Ag

Moles of Ag = 17.86 mol Ag₂S × (16 mol Ag/8 mol Ag₂S) = 35.717 mol Ag

3. Calculate the mass of Ag

Mass of g = 35.717 mol Ag × (107.87 g Ag/1 mol Ag) = 3853 g Ag

You must react 3853 g of Ag to produce 567.9 kJ of heat

3 0

2 years ago

Which fossil occurs on the most land masses

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8 0

3 years ago

How much force is required to accelerate an 8-kg wagon at a rate of 15 m/s

Dovator [93]

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 8 × 15

We have the final answer as

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4 0

2 years ago