Scientists discovered that stars i.n the universe are mostly composed of which elements?

Chemistry

2 answers:

8_murik_8 [283]3 years ago

6 0

I dunno what you mean sorry can't help you

KiRa [710]3 years ago

3 0

Scientists discovered that stars are mostly composed of HYDROGEN.
Hydrogen is the most abundant element out of all the elements in the universe and it makes up three quarter of all matter. As an element it has the smallest atomic number.

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What is the mass in grams of 0.687 moles of NH three

stepan [7]

NH3 = 14 +3*1=17 g/mol
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3 years ago

What is the theoretical yield of moles of hydrogen that can be produced from 0.032g of MG?

Ugo [173]

Answer:

1.31x10⁻³ moles of H₂

Explanation:

This is the equation:

Mg(s) + 2H₂O (g) → Mg(OH)₂ (aq) + H₂(g)

Ratio is 1:1, so 1 mol of Mg is needed to produce 1 mol of H₂

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3 years ago

Explain what each quantum number in a quantum number set tells you about the electron. Compare and contrast the locations and pr

klio [65]

This is a bit long right now.

(n l m s) these are the numbers.

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4 0

3 years ago

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A major textile dye manufacturer developed new yellow dye. The dye has a percent composition of 75.9 5% C, 17.72% N

AnnZ [28]

Answer:

Such molecule must have molecular formula of C15N3H15

Explanation:

Mass of carbon in such molecule

$0.7595*240_{g/mol} =182.28_{g C/mol}$