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Oksana_A [137]
3 years ago
10

The first successful perpetual motion machine was invented in 1859. True OR False

Chemistry
1 answer:
STALIN [3.7K]3 years ago
4 0

Answer:

false

Explanation:

made in 12th centry

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A mixture of 0.220 moles CO, 0.350 moles H2 and 0.640 moles He has a total
emmasim [6.3K]

Answer:

P(H₂) = 0.8533 atm

Explanation:

n(CO) = 0.220 mole

n(H₂)  = 0.350 mole

n(He) = 0.640 mole

_______________

∑ n  =  1.210 moles

mole fraction => X(H₂) = 0.350/1.210 = 0.2892

Dalton's Law of Partial Pressures => P(H₂) = X(H₂)·P(ttl) = 0.2892(2.95 atm) = 0.8533 atm

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3 years ago
How did the nucleus evolve through time?
Tems11 [23]

Answer:

The nucleus represents a major evolutionary transition. As a consequence of separating translation from transcription many new functions arose, which likely contributed to the remarkable success of eukaryotic cells. Here we will consider what has recently emerged on the evolutionary histories of several key aspects of nuclear biology; the nuclear pore complex, the lamina, centrosomes and evidence for prokaryotic origins of relevant players.

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How can you increase the rate of a chemical reaction
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Answer: increase the reactants

Explanation:

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The lab assistant accidentally poured water in the spirit (alcohol). How would you help him/her to get back the spirit. Explain.
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The water and the spirit can be easily separated by a method called fractional distillation.

<u>Explanation:</u>

  • There are many ways of separating alcohol from water. The most common method is by heating. Water has a higher boiling point when compared to alcohol and the water can be easily evaporated into the air.
  • This method is called Fractional distillation. As it requires a rounded flash, a beaker, and a container. If the content is put under the heat for a certain degree celsius the water in the content is evaporated.
  • It is to be collected and connected to a container. At last, the alcohol and water are separated.
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