IM ON A TIMER! What are the main types of star clusters? Check all that apply.

Chemistry

2 answers:

jekas [21]3 years ago

8 0

There are globular and open star clusters, but there are no binary, eclipsing, or wobbling ones.

mojhsa [17]3 years ago

8 0

Answer:

globular

open

Explanation:

A star cluster is a small group of stars found in galaxy. There are two types of star clusters:

Open and globular.

An open cluster contains about 100 stars. These are found in disk of galaxy. These are less dense group of stars containing young one.

A globular cluster is has thousands of stars tightly packed together. These are found in halo of galaxy and contain relatively old stars.

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Given substances f2, kr, cl2 and hbr rank them with respect to the highest boiling point?

Inessa05 [86]

The Hbr has highest boiling point followed by Kr , $Cl_{2}$ and $F_{2}$ .

The Hbr has highest boiling point due to presence of intermolecular H-bonding that is hydrogen bonding.

The electronegativity of bromine is greater than hydrogen atom. The electronegativity difference hydrogen atom and bromine atom is high. So, due to this a positive dipole is generated at hydrogen atom and partial negative charge, these partial charge is called dipole. In a HBr molecule one H-atom attracted by Br-atom of another atom by force of attraction and this partial force of attraction is called H-bonding.

Other all given molecules are arrange according to its molecular mass because boiling points is directly proportional to the molecular mass of molecule.

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3 0

1 year ago

Not easily changed

Advocard [28]

I would say when an atom has its valence electron shell filled like a noble gas has, it is not easily changed.

I’m not entirely sure of what you’re asking, but if you’re talking about bonding then it would be an ionic bond that is not easily changed.

6 0

3 years ago

Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+

Anna11 [10]

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