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2 years ago

Is this solution saturated or unsaturated? How can you tell? the solution is strontium and phosphate mixed in water

1 answer:

3 0

If you continued to add the solute to the solution, the solute will not dissolve any more. Then the solution is saturated. If it will dissolve. it is unsaturated.

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Which of the following values are not equal to 1 mole?

Gekata [30.6K]

Answer:

none of them are equal to one mole

3 0

2 years ago

What is absolute zero? A) The temperature at which the particles of matter are at their lowest energy points. B) The temperature

Alja [10]

Answer:

A) The temperature at which the particles of matter are at their lowest energy points.

Explanation:

Absolute temperature refers to the lowest possible temperature. At this state, no heat energy remains in the substance; the energy of the particles are at their lowest energy points.

7 0

2 years ago

15A.4(a) What is the temperature of a two-level system of energy separation equivalent to 400 cm−1 when the population of the up

maksim [4K]

Answer:

T = 525K

Explanation:

The temperature of the two-level system can be calculated using the equation of Boltzmann distribution:

$\frac{N_{i}}{N} = e^{-\Delta E/kT}$ (1)

where Ni: is the number of particles in the state i, N: is the total number of particles, ΔE: is the energy separation between the two levels, k: is the Boltzmann constant, and T: is the temperature of the system

The energy between the two levels (ΔE) is:

$\Delta E = hck$

where h: is the Planck constant, c: is the speed of light and k: is the wavenumber

$\Delta E = 6.63\cdot 10^{-34} J.s \cdot 3\cdot 10^{8}m/s \cdot 4 \cdot 10^{4}m^{-1} = 7.96 \cdot 10^{-21}J$

Solving the equation (1) for T:

$T = \frac{-\Delta E}{k \cdot Ln(N_{i}/N)}$

With Ni = N/3 and k = 1.38x10⁻²³ J/K, the temperature of the two-level system is:

$T = \frac{-7.96 \cdot 10^{-21}J}{1.38 \cdot 10^{-23} J/K \cdot Ln(N/3N)} = 525K$

I hope it helps you!

3 0

3 years ago

A methane burning formula. How many liters of oxygen is needed to bun 5l of methane?

Brilliant_brown [7]

C: 8 I’m pretty sure, I did partly the problem and that’s what I got! if correct pls heart this

7 0

2 years ago

20. Explain, in terms of valence electrons, why the bonding in NaCl is ionic.

Ivahew [28]

Answer:

MgO, is similar to the bonding in barium chloride, BaCl2. The bonding in each compound involves a transfer of valence electrons from the metal to the nonmetal; both metals lose all of their valence electrons

Explanation:

used goggle

4 0

2 years ago