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Olegator [25]
3 years ago
5

Young stars, just beginning their life in the galaxy, would contain mostly

Chemistry
1 answer:
amm18123 years ago
6 0

Answer:Hydrogen and Helium

Explanation: Young stars would contain first hydrogen, then helium.

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Calculate the enthalpy change for the reaction of hydrogen and chlorine using the bond energies below.
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Answer:

final-intial temperature= enthalpy change

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Which statement Is true of chloroplasts? A. They transport glucose into the cell. B. They convert light energy into chemical ene
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ch sulfide (ZnS) occurs in the zinc blende crystal structure, (a) If 254 g of ZnS contains 170 g of Zn, what is the mass ratio o
Aleonysh [2.5K]

Answer:

The mass ratio of zinc to sulfide is 85:42.

2.5559 kg of Zn are in 3.82 kg of ZnS.

Explanation:

a) Mass of zinc sulfide = 254 g

Mass of zinc in a zinc sulfide sample = 170 g

Mass of sulfide in zinc sulfide sample = x

254 g = 170 g+ x

x = 84 g

The mass ratio of zinc to sulfide:

\frac{170 g}{84 g}=\frac{85}{42}

b) Mass of zincsulfide sample = 3.83 kg

The mass ratio of zinc to sulfide is 85:42.

Let the mass of zinc and sulfide be 85x and 42x respectively:

85 x+ 42 x=3.82 kg

x =0.03007 kg

Mass of an zinc= 85x=85 × 0.03007 kg= 2.5559 kg

8 0
3 years ago
Calculate the empirical formula for DCBN, given that the percent composition is 48.9%C, 1.76%H, 41.2%Cl, and 8.15%N.
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empirical formula is C7H3NCl2

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5 0
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As much sugar as will dissolve is added to hot water. The water is then
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The answer is C because it says describe the final sugar and C is unsaturated and in the problem it says as much as sugar will dissovle .
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