What are the main types of Star clusters check all that apply

2 answers:

5 0

dude you got a whole profile pic and don't know how to put the list of options????????? i made a 72 cause there`s others like you that don`t have options to choose from?????

Oksana_A [137]3 years ago

4 0

Answer:

The three basic types of clusters astronomers have discovered are globular clusters, open clusters, and stellar associations. ...

Globular clusters were given this name because they are nearly symmetrical round systems of, typically, hundreds of thousands of stars. ...

Open clusters are found in the disk of the Galaxy.

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How many moles of chloride ions are there in 2.5 L of 5 M magnesium chloride?

castortr0y [4]

Answer:

$n_{Cl^-}=25molCl^-$

Explanation:

Hello,

In this case, since the given 5-M concentration of magnesium chloride is expressed as:

$5\frac{molMgCl_2}{L}$

We can notice that one mole of salt contains two moles of chloride ions as the subscript of chlorine is two, in such a way, with the volume of solution we obtain the moles of chloride ions as shown below:

$n_{Cl^-}=5\frac{molMgCl_2}{L}*\frac{2molCl^-}{1molMgCl_2} *2.5L\\\\n_{Cl^-}=25molCl^-$

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