What is the wavelength of electromagnetic radiation with a frequency of 5.00 x 10^12 Hz? S
1 answer:
Answer:
Infrared
Explanation:
To calculate the wavelength if the electromagnetic radiation, we must use the following formula:
c = f × λ
where c is the speed of the wave (in this case it's the speed of light, which is 3 × m/s) , f is the frequency and λ is the wavelength.
Using this formula, all we have to do is plug in our values and rearrange for the answer:
c = f × λ
3 × = 5.00 x
Hz × λ
λ = 3 × /5.00 x
λ = 6.00 × m = 6.00 ×
nm
Now that we know the wavelength we can figure out which kind of electromagnetic radiation this is.
6.00 × nm falls in the range of infrared radiation. We know this either from memorizing the values of the wavelengths or looking up a reference.
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Answer:
21.5 g.
Explanation:
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In this case, since the reaction between the given compounds is:
We can see that according to the law of conservation of mass, which states that matter is neither created nor destroyed during a chemical reaction, the total mass of products equals the total mass of reactants based on the stoichiometric proportions; in such a way, we first need to compute the reacted moles of Li3P as shown below:
Now, the moles of Li3P consumed by 15 g of Al2O3:
Thus, we infer that just 0.29 moles of 0.73 react to form products; which means that the mass of formed products is:
Therefore, the total mass of products is:
Which is not the same to the reactants (53 g) because there is an excess of Li₃P.
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