A solution has which of the following properties
Answers
Answer:
This question is incomplete
Explanation:
A solution is an homogeneous mixture of two or more substances. These substances could be in the same form (as in solid, liquid or gas) or in different forms. Examples of solution in the same phases are
- Air (all gases): oxygen, nitrogen, carbon dioxide and noble gases
- Dilute acid solution (all liquid): water and acid
- NPK fertilizer (all solid): powdered nitrogen,phosphorus and potassium
Examples of solution in different phases are
- Salt solution: common salt (solid) and water (liquid)
- Oxygen in water: oxygen (gas) dissolved in water (liquid) which enables survival of aquatic animals
- Soot floating: soot (solid) and air (gas)
NOTE: Homogeneous mixture is a mixture whose constituents are evenly distributed in the mixture
A solution has a number of unique characteristics. First of all, it has a consistent composition throughout, which denotes that the solute is dispersed uniformly throughout the solvent to produce a homogenous mixture.
Second, the solution is transparent and not turbid because the solute particles do not scatter light. Thirdly, a solution doesn't have discrete layers since the solute has completely dissolved in the solvent. Furthermore, the presence of the solute particles causes the boiling point of the solution to normally be higher than that of the pure solvent. However, because the volume change during dissolution is typically minimal, the density of the solution stays almost the same as that of the pure solvent.
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--The complete Question is, A solution has what of the properties?--
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I NEED THESE ANSWERS ASAPPLEASE HELP!!chemically balance the following:____ Mg(OH)2 + __ HCl → ____ MgCl2 + __ H2O____ CH4 + ____ O2 → _____ CO2 + ____ H2O___ Cu + ___ Br2 → ___ CuBr2
b. Uranium
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Answers
The example of a chemical agent is chlorine. Details about chemical substances can be found below.
What is a chemical substance?
A chemical is a material with a specific chemical composition.
Chlorine is a toxic, green, gaseous chemical element (symbol Cl) with an atomic number of 17.. Chlorine is widely used for treating water.
Therefore, an example of a chemicalagent is chlorine.
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Answers
Petroleum and coal can be mined from the continental shelf. Hot magma from inside the Earth seeps out from the crevices in the mid-ocean ridge. There is speculation regarding whether this is a cost-effective technique. Fossil fuels and mineral deposits can be located all throughout the continental shelf and also in some of the deepest depths of the ocean.
Answer:The given statement is true.
Explanation:
Continental Shelf: A portion of continent submerged under the relative shallow ocean water.Most of the gradually slopes down in to the water.
The relatively flat surface and shallow water makes it fitr place to harvest sea food, non renewable energy resources like : coal, petroleum .
Answers
Given:
64.82 g of aluminum metal
100.0oC is cooled to 82.0 °C
specific heat of aluminum is 0.897 J /g °C.
Required:
Change in heat energy
Solution:
This can be solved through the equation H = mCpT where H is the heat, m is the mass, Cp is the specific heat and T is the change in temperature.
The specific heat of the water is 4.18 J/g-K
Plugging in the values into the equation
H = mCpT
H = (64.82) (0.897 J /g °C) (82 – 100)
H = -1,046.6 J
Answers
The concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.
To determine the concentration of gallium in kilograms per cubic meter, we need to convert the concentration from atomic percent (at%) to kilograms per cubic meter.
The atomic fraction is the ratio of the number of gallium atoms to the total number of atoms in the silicon-gallium mixture.
We need to know the atomic masses of gallium and silicon. The atomic mass of gallium is 69.72 g/mol, and the atomic mass of silicon is 28.09 g/mol.
The atomic fraction of gallium can be calculated using the formula:
Atomic fraction of gallium = (Concentration of gallium in at%) / (Atomic mass of gallium) / [(Concentration of gallium in at%) / (Atomic mass of gallium) + (Concentration of silicon in at%) / (Atomic mass of silicon)]
Plugging in the given values:
Atomic fraction of gallium = (%) / (69.72 g/mol) / [(
at%) / (69.72 g/mol) + (100 -
) at% / (28.09 g/mol)]
Now, let's convert the atomic fraction to the number of gallium atoms per cubic meter. We can use Avogadro's number, to make this conversion.
Number of gallium atoms per cubic meter = Atomic fraction of gallium × Avogadro's number.
Mass of gallium per cubic meter = Number of gallium atoms per cubic meter × (Atomic mass of gallium / 1000)
Therefore, the concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.
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Final answer:
The concentration of gallium in kilograms per cubic meter can be calculated using the atomic mass of gallium and Avogadro's number.
Explanation:
To calculate the concentration of gallium in kilograms per cubic meter, we can use the atomic mass of gallium and Avogadro's number. The concentration in kilograms per cubic meter can be found using the formula:
Concentration (kg/m³) = Concentration (% by mass) x Density (g/cm³) x Atomic Mass (g/mol) / 1000 x Avogadro's Number
First, convert the concentration from at% (atomic percent) to % by mass. Since gallium has an atomic mass of 69.7 g/mol, we can use this value to find the concentration in kilograms per cubic meter.
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Answers
Answer:
The answer to your question is 68 g
Explanation:
Data
mass of H₂ = 12 g
mass of NH₃ = ?
Balanced chemical reaction
3H₂ + N₂ ⇒ 2NH₃
Process
1.- Calculate the molar mass of H₂
H₂ = 1 x 6 = 6
NH₃ = 2[(14 x 1) + (3 x 1)]
= 2[14 + 3]
= 2[17]
= 34 g
2.- Use proportions to find the mass of NH₃
6 g of H₂ --------------- 34 g of NH₃
12g of H₂ ---------------- x
x = (12 x 34) / 6
x = 408/6
x = 68 g of NH₃
Answers
Final answer:
Blue light is emitted when an electron in a He+ ion falls from the energy level n=4 to n=1. This is because the energy difference between these levels is similar to that in a hydrogen atom when blue light is emitted (from n=5 to n=2).
Explanation:
The energy of the emitted photon when an electron transitions between energy levels in an atom is determined by the difference between the energy levels it transitions between. This is described by the formula: E = hν, where E stands for energy, h stands for Planck's constant, and ν stands for frequency. The color of the emitted light, or the wavelength, is determined by the energy of the photon.
For blue light to be emitted when an excited electron falls from n=4 in a He+ ion, it must fall into n=1. This is because the energy gap between the n=4 and n=1 levels in a He+ ion is similar to that between the n=5 and n=2 levels in a hydrogen atom, which results in the emission of blue light.
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Final answer:
In a helium ion (He+), an electron would need to fall from n=4 to n=1 to emit a photon of blue light, similar to the photon emitted when an electron in a hydrogen atom falls from n=5 to n=2.
Explanation:
According to the Bohr model of atoms, when an electron falls from a higher to a lower energy level, a photon is emitted. The energy (and therefore color) of the photon corresponds to the energy difference between the two energy levels. In the case of your question, an excited electron in a hydrogen atom falls from n=5 to n=2 and emits a photon of blue light.
If an electron in an excited helium ion (He+) falls from the n=4 level, to emit a photon of similar energy (and thus color), it must fall to a level that yields a similar energy difference. Based on the energy levels of helium and hydrogen, the electron in the He+ ion would need to fall to n=1 to emit a photon of similar energy to the blue light from the hydrogen atom, given that the energy difference in He+ ion is larger than in hydrogen atom for the same quantum numbers due to its greater nuclear charge.
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