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4 years ago

How many moles are in 1.5 x 10^20 molecules of NH3?

1 answer:

5 0

Because the question is asking moles of NH3, the compound, any subscripts are irrelevant. It only wants to know how many moles of NH3 molecules, not individual atoms.

Therefore, we can simply convert to moles. 1.5x10^23/6.022x10^23 = .249 moles of NH3.

(If it were to ask moles of Hydrogen, for example, you would multiply the answer by 3, because there are 3 atoms of Hydrogen per one molecule of NH3. But this only asks for moles of the entire compound).

hope you have a great day! :)

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3 years ago

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ololo11 [35]

Answer:

167.2 g

Explanation:

Known

VC4H10 = 21.3

T = 0.00 C (convert to Kelvin: 273 K)

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Unknown

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1. Write the balanced chemical equation

1 C4H10 + 1O2 -----> 4 CO2 + 5 H2O

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3 years ago

If you want to melt ice into liquid water, does the ice absorbs heat or release heat? Is this endothermic or exothermic?

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Answer:

Endothermic

Explanation:

This would be an endothermic reaction, due to the fact that the water would be signifigantly warmer then the ice cube, which causes it to melt.

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Answer:

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