Which is the best description of a molecule?

Answer:

Option C

Explanation:

Consider the ionic equation of this chemical equation. We are given barium chloride and silver nitrate as the reactants, and silver chloride and barium nitrate as the products. We can thus conclude that the ionic equation ( not balanced yet ) should be as follows -

Ba( 2 + ) + Cl ( - ) + Ag ( + ) + NO3 ( - ) ------> AgCl + Ba( 2 + ) + NO3( - )

As you can see these compounds are present in aqueous solutions, and are thus dissociated.

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Now let us take a look at the number of elements on the reactant and product sides, and balance this chemical equation out -

Ba( 2 + ) + 2Cl ( - ) + 2Ag ( + ) + 2NO3 ( - ) ------> 2AgCl + Ba( 2 + ) + 2NO3( - )

Solution = Option C!

Answer:

Ag(s):H2O(l)  = 3:2

For 3 moles Ag(s) we'll have 2 moles H2O(l)

Option D is correct

Explanation:

Step 1: Balancing the equation

3 Ag (s) + 4 HNO3 (aq) → 3 AgNO3 (aq) + NO (g) + 2 H2O (l)

3Ag(s)  +  4NO  ^3-  +  4H+  →3Ag+ +3NO3- +  +NO  +  2H2O

3Ag(s)  +  NO  ^3-(aq)  +  4H+(aq)  →3Ag+(aq)  +NO(g)  +  2H2O(l)

Step 2: The ratio between Ag(s) and H2O(l)

Ag(s):H2O(l)  = 3:2

For 3 moles Ag(s) we'll have 2 moles H2O(l)

Option D is correct

Answer:

It is basic.

Explanation:

Bases can neutralize acids.

Answer:

Piso = 32.17 Torr

Pprop = 5.079 Torr

yprop = 0.1364

yiso = 0.8636

Explanation:

From the question; we can opine that :

• The mole fraction of isopropanol in a mixture of isopropanol and propanol will be 1.

• The partial pressure of isopropanol will be its mole fraction multiplied by vapor pressure of isopropanol

• The partial pressure of propanol will be its mole fraction multiplied by vapor pressure of propanol

• In the vapor, the mole fraction of propanol will be its partial pressure divided by the sum of the two partial pressures      

NOW;

When xprop = 0.243; xisopropanol will be 1- 0.243 = 0.757

P°iso = 45.2 Torr at 25 °C so

Piso will be 45.2 × 0.757 = 32.17 Torr

Pprop will be 20.9 × 0.243 = 5.079 Torr

yprop = 5.079/(5.079 +32.17) = 0.1364

yiso = 1-0.1364 = 0.8636

Answer:

To determine the value of Kp for the given equilibrium, we need to use the partial pressures of the gases involved.

In the balanced equation: 2 HI (g) ⇌ H₂ (g) + I₂ (g), the stoichiometric coefficients are 2, 1, and 1 respectively.

At equilibrium, the expression for Kp is given by:

Kp = (P(H₂) * P(I₂)) / (P(HI)²)

Using the provided partial pressures:

P(HI) = 1.9 atm

P(H₂) = 7.9 atm

P(I₂) = 2.3 atm

Substituting these values into the expression for Kp:

Kp = (7.9 * 2.3) / (1.9²)

Kp ≈ 19.5 / 3.61

Calculating the result:

Kp ≈ 5.4

Therefore, the value of Kp for the given equilibrium is approximately 5.4.

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Answer:

Atom is made up of NUCLEUS and electrons revolving around nucleus.

Nucleus itself contains protons and neutrons. Protons and neutrons are approximately 1680 times heavier than the electrons. So the major contribution to the mass of an atom comes from the nucleus.

Final answer:

The mass of an atom is mostly carried by the nucleons, protons, and neutrons, in its nucleus. Electrons contribute very little to the overall mass of an atom because of their small mass.

Explanation:

Essentially, all of the mass of an atom is due to the nucleons. An atom is primarily composed of protons, neutrons, and electrons. However, the mass of an electron is so small that it contributes very little to the overall mass of an atom. The term 'nucleons' refers to the particles in the nucleus of an atom, namely the protons and neutrons. These particles carry most of the atom's mass given their relatively large mass compared to electrons.

Learn more about Atomic Mass here:

brainly.com/question/32442642

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