$1,298.53 - 200.94 = 1,097.59
$1,097.59 amount still need to save for.
1,097.59/84.43 = 13
13 weeks is the amount of time Riley needs to save enough money for the TV
Good afternoon,robot
are there any specific roads you are talking about?
Answer:
Explanation: A bar of an unknown metal has a length of 0.975 m at 45°C and a length of 0.972 m at. 23°C.
Empirical formula of compound is XF3
Compound consist of 65% F
In 100g of compound there is 65 g of F
= 65 / 19 moles of Fluorine = 3.421 moles
So moles of X = 3.421 / 3 = 1.140 moles
And in 100 g X
consist of 35 g
So the molar mass of X = 35 / 1.140 = 30.71 g = 31
approximately
And it is the mass of phosphorus
So the empirical formula for the compound is PX3
Answer:
Different wavelengths of light also have different frequencies, so the "individual" waves of light are different.
So when you see a given spectra, you are actually watching a superposition of different light waves, and as the waves do not interact that much between them, you can see the different colors.
You can think this similarly as the case with two different sound waves, one high in pitch, and another low.
You can easily identify them, as they do not collide between them.
Now, if you are asking "why the spectrum has different colors".
This is because the levels of energy in each element are different, the outer electrons have weaker bonds, so they will emit photons with less energy (larger wavelength) and so on.
So there are multiple wavelengths because electrons with stronger and weaker bonds are jumping between states at the same time.