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kiruha [24]
3 years ago
5

Stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and heliu

m. Based on your data, is the newly discovered star a younger star? Explain your answer.
Chemistry
2 answers:
g100num [7]3 years ago
7 0

Answer:

Newly discovered star is a younger star

Explanation:

The composition of the newly discovered star is Hydrogen, Lithium, Neon, Sodium, Mercury

It consists of both hydrogen and helium of which the old stars are not made up of as they are heavier than the new stars.

Considering the above fact, it can be stated that the new star is a young star.

DochEvi [55]3 years ago
4 0

Answer:

The answer above is correct

Explanation:

I did this lab

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Determine the molar mass of a compound that has a density of 0.1633 g/L at STP.<br> (show work)
hodyreva [135]

Answer:

                     M.Mass  =  3.66 g/mol

Data Given:

                  M.Mass  =  M = ??

                  Density  =  d  =  0.1633 g/L

                  Temperature  =  T  =  273.15 K (Standard)

                  Pressure  =  P  =  1 atm (standard)

Solution:

              Let us suppose that the gas is an ideal gas. Therefore, we will apply Ideal Gas equation i.e.

                                             P V = n R T    ---- (1)

Also, we know that;

                       Moles  =  n  =  mass / M.Mass

Or,                                   n  =  m / M

Substituting n in Eq. 1.

                                             P V = m/M R T   --- (2)

Rearranging Eq.2 i.e.

                                             P M = m/V R T   --- (3)

As,

                     Mass / Volume = m/V = Density = d

So, Eq. 3 can be written as,

                                             P M = d R T

Solving for M.Mass i.e.

                                             M = d R T / P

Putting values,

M  =  0.1633 g/L × 0.08205 L.atm.K⁻¹.mol⁻¹ × 273.15 K / 1 atm

M  =  3.66 g/mol

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3 years ago
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Answer:

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5 0
3 years ago
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marusya05 [52]

Answer:

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Explanation:

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<u />

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0.069 mole = ? g of Sulphur

= 0.069 x 32

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3 years ago
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steposvetlana [31]
<h2>Answer:</h2>

<h3>Hg2 ( NO2 )2</h3>

<h2>Explanation:</h2>

<h3>Formula of mercury ( 1 ) dioxonitrate 111 is Hg2 ( NO2 )2//</h3>

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Answer:

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Explanation:

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