500 mg in g :
1 g ----------- 1000 mg
? -------------- 500 mg
500 x 1 / 1000 => 0.5 g
total mass:
50 g + 0.5 g + 0.1 g => 50.6 g
hope this helps!
B will be the one I think tbh
Answer:

Explanation:
R = Rydberg constant = 
= Principal quantum number of an energy level = 2
= Principal quantum number of an energy level for the atomic electron transition = 4
Wavelength is given by the Rydberg formula

The wavelength of the light emitted is
.
MgCl2 would be magnesium chloride.
a window
Explanation:
The diagram attached that shows light interacting with an object shows that the object is most definitely a window.
The window must have been made up of glass.
- The wave path completely describes refraction of waves as they cross the boundary between two medium.
- The light moves from a less dense to a denser medium and this causes the velocity to slow down.
- On coming from the other side, the wave rays are attenuated.
learn more:
Refraction brainly.com/question/12370040
Reflection and diffraction brainly.com/question/3183125
#learnwithBrainly