The volume of the aqueous solution of sodium sulfate required is 153.85 mL.
<h3>Number of moles of the salt</h3>
The number of moles of the salt in the given mass is calculated as follows;
moles = reacting mass / molar mass
molar mass of sodium sulfate = 142 g/mole
moles = (4.27) / (142)
moles = 0.03 mole
<h3>Volume of the aqueous solution of sodium sulfate</h3>
Concentration = moles/volume in liters
0.195 = 0.03/V
V = 0.03/0.195
V = 0.15385 liters
V = 153.85 mL
Thus, the volume of the aqueous solution of sodium sulfate required is 153.85 mL.
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Answer:
Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours. The spectrum ranges from dark red at 700 nm to violet at 400 nm.The 'colour' of an object is the wavelengths of light that it reflects. This is determined by the arrangement of electrons in the atoms of that substance that will absorb and re-emit photons of particular energies according to complicated quantum laws.The reason that different waves of light appear to be different colors of light is because the color of a light wave depends on its wavelength. For example, the wavelength of blue light is about 450 nanometers, while the wavelength of red light is about 700 nanometers.
Explanation:
Answer:
B. to determine that electric beams in cathode ray tubes were actually made of particles
Explanation:
Since mole ratio of magnesium to hydrochloric acid is 1:2, the answer is 1 mole of HCL.
Answer:
It is an example of single displacement reaction.
Explanation:
<u>Single replacement reaction:</u>
A single element replaces another element in a compound.
For example,
The given reaction is as follows.
In the above reaction, aluminium bromide is dissociated into the , these bromide ions are reacted with potassium atoms to form potassium bromide.
Here, only one element displaces therefore, it is an single displacement reaction.