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masha68 [24]
3 years ago
9

Which of these can be described as a system of stars, gases, dust, and other matter that orbits a common center of gravity?

Chemistry
2 answers:
velikii [3]3 years ago
8 0
It’s c galaxy ((: so yeah
torisob [31]3 years ago
3 0
The answer would be C. Galaxy.
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HELP ASAP PLZ!!!! Find the mass of each substance. Show your work.
Gemiola [76]

Answer:

A. m C5H12 = 108.23 g

B. m F2 = 547.142 g

C. m Ca(CN)2 = 71.85 g

Explanation:

  • mass (m) = mol (n) × molecular weigth (Mw)

∴ Mw C5H12 = ((12.011)(5)) + ((1.008)(12)) = 72.151 g/mol C5H12

∴ Mw F2 = (18.998)(2) = 37.996 g/mol F2

∴ Mw = Ca(CN)2 = 40.078+((12.011+14.007)(2)) = 92.114 g/mol Ca(CN)2

A. m C5H12 = ( 1.50 mol)×(72.151 g/mol) = 108.23 g C5H12

B. m F2 = (14.4 mol)×(37.996 g/mol) = 547.142 g F2

C. m Ca(CN)2 = (0.780 mol)×(92.114 g/mol) = 71.85 g Ca(CN)2

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Tcecarenko [31]

Answer:

Uh first of all this is algebra but I'll answer this

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Explanation:

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