Answer:
Density of mercury is 13600 kg
Answer:A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and a superior planet, becoming visible against (and hence obscuring a small portion of) the solar disk. ... Transits of Venus are among the rarest of predictable astronomical phenomena.
Explanation:
B. A mole is the molar mass in 1 liter. So 2 m needs 2 moles in 1 liter.
Answer:
<h2>2.58 mL</h2>
Explanation:
The volume of a substance when given the density and mass can be found by using the formula
![volume = \frac{mass}{density} \\](https://tex.z-dn.net/?f=volume%20%3D%20%20%5Cfrac%7Bmass%7D%7Bdensity%7D%20%5C%5C)
From the question we have
mass = 31 g
density = 12 g/mL
![volume = \frac{31}{12} \\ = 2.58333](https://tex.z-dn.net/?f=volume%20%3D%20%20%5Cfrac%7B31%7D%7B12%7D%20%20%20%5C%5C%20%20%3D%202.58333)
We have the final answer as
<h3>2.58 mL</h3>
Hope this helps you
The spectral line has been defined as the more or less number of photons in the spectrum that appears bright or dark. The electron jumping from n = 4 to 3 belongs to the Paschen series.
<h3>What is the Paschen series?</h3>
The Paschen series is the Infrared (I.R) region that has a number of lines estimating from higher energy levels to n = 3 energy levels. If the electron jumps from n = 4 to n = 3 then they have wavelengths of 1875 nm.
This wavelength has been found to lie in the IR region that emits electrons from the atom of hydrogen. The electron tends to move from higher energy states to lower energy states.
Therefore, the electron transition belongs to the Paschen series.
Learn more about the Paschen series, here:
brainly.com/question/17147448
#SPJ4