A mixture of sand and table salt can be separated by filtration because the substances in the mixture differ in solubility in water. Thus, the correct option for this question is D.
Solubility may be defined as the phenomenon in chemistry that involves the maximum amount of a substance that will significantly be disbanded in a given amount of solvent at a particular temperature.
The answer to the above question is better understood by the fact that when you mix both salt and sand in the water, you may find that salt is completely soluble in water while sand is not. This is because the bond of water is not competent enough to dissolve the sand.
Therefore, the correct option for this question is D.
To learn more about Solubility, refer to the link:
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This Metal belongs to Group I (Alkali Metals).
Alkali Metals present in Group I are considered as the most reactive metals in periodic table. There reactivity increases tremendously down the group. The reactivity is mainly due to less ionization energies. Therefore, going from top to bottom along the group the ionization energies decreases hence, increasing there reactivity respectively.
Alkali metals when reacted with water undergoes an exothermic reaction resulting the formation of corresponding metal hydroxide and hydrogen gas i.e.
2 M + 2 H₂O → 2 MOH + H₂
Also, these metals are in solid state at room temperature (i.e. 25 °C) and their boiling points are as follow,
Lithium = 180.5 °C
Sodium = 97.79 °C
Potassium = 63.5 °C
Rubidium = 39.48 °C
Cesium = 28.44 °C
2) Why doesn't the sun make the wheel move?
solve these to and you get picked brainlley
Answer:
there's no way to answer that
Answer:
Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.
The lattice energy in the formation of one mole of BaSe bonds can be calculated using the equation Ulattice = (k * e2) / r, where k is the proportionality constant, e is the charge of the ions, and r is the distance between the ions. Given the radius of the barium ion and selenide ion, we can calculate the distance between them and then use it in the equation to find the lattice energy. The lattice energy in this case is approximately 10.8 billion N.
The amount of energy released in the formation of one mole of BaSe bonds can be calculated using the concept of lattice energy. Lattice energy is the energy released when ions come together to form a solid lattice structure. In this case, we have a barium ion (Ba2+) and a selenide ion (Se2-) coming together to form BaSe bonds.
To calculate the lattice energy, we can use the equation:
Ulattice = (k * e2) / r
Where:
Given that the radius of the barium ion is 1.35 Å and the radius of the selenide ion is 1.98 Å, we can calculate the distance between them and then use that value in the equation to find the lattice energy.
Let's calculate it:
Distance between ions = radius of Ba ion + radius of Se ion
= 1.35 Å + 1.98 Å
= 3.33 Å
Converting to meters:
= 3.33 * 10-10 m
Now, substituting the values in the equation:
Ulattice = (8.99 * 109 Nm2/C2) * (2 * 2) / (3.33 * 10-10 m)
= 10791849712.91 N
Therefore, the amount of energy released in the formation of one mole of BaSe bonds (lattice energy) is approximately 10.8 billion N.
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1. weather maps/satellite
2. Doppler radar
3. radiosonde
4. wind vane
5. psychrometer
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A. uses two thermometers; a dry and wet bulb
B. points in the direction winds are coming from
C. uses frequency waves to track particle movement
D. used to help track air masses and fronts
E. carried with a weather balloon
Answer: The correct matching sequence is:
1 -D , 2-C, 3-E, 4-B , 5-A
Explanation:
Weather maps/satellite:These are the satellites used to monitor the climate on the Earth in day and night.Like moc=vment of clouds, El Nino. La Nina ertc
Doppler radar is a system used to track the velocity or motion of the rain , storm or precipitation.It emit microwave signals to check the change in frequency of the wave due to the motion of the particles.
Radiosonde is an instrument carried away by balloon or any other means into different layers of atmosphere and sends information via radio.
Wind vane is an instrument used to show the direction of the wind. P
Psychrometer is an instrument used to measure atmospheric humidity.It consist of two thermometer that is wet bulb thermometer and dry bulb thermometer.
Match each weather instrument with its description.