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timofeeve [1]
3 years ago
12

g If a sample of 50 mL of ethyl benzene (bp = 136 C) was contaminated with 10 mL of ethyl acetate (bp = 77 C) what effect would

this have on the boiling point measurement?
Chemistry
1 answer:
PolarNik [594]3 years ago
6 0

Answer:

melting point will be higher than that of pure ethyl acetate

Explanation:

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4 a joule is the answer
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2 moles of a gas have a pressure of 2 atm at a temperature of 300 K. What is the volume of the gas?
qwelly [4]
  • No of moles=2mol=n
  • Pressure=2atm=P
  • Temperature=300K=T
  • Volume=V

\\ \tt\hookrightarrow PV=nRT

\\ \tt\hookrightarrow V=\dfrac{nRT}{P}

\\ \tt\hookrightarrow V=\dfrac{2(8.314)(300)}{2}

\\ \tt\hookrightarrow V=8.314(300)

\\ \tt\hookrightarrow V=2494.2mL

\\ \tt\hookrightarrow V=24.94dm^3

4 0
2 years ago
Pleaseeee helppp
Dmitry [639]

A chemical change

Explanation:

In this reaction, a chemical change has occurred, here are some indicators of chemical changes from the reaction;

Chemical changes are changes in which new products are formed.

  • Formation of bubbles and precipitates: these are new substances that indicates a chemical change. The bubbles and insoluble precipitate are good indicators of chemical change.
  • A temperature change that is large; This is also typifies chemical changes. When temperature rises in reaction, a chemical change has occurred.
  • The bubbles and precipitates cannot be combined to give the reactants. The reaction is irreversible.

learn more:

Chemical change brainly.com/question/9388643

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4 0
3 years ago
Dana is trying to determine if an unknown sample is a pure substance or not. The sample has a cloudy white color, and it seems e
Firdavs [7]

Answer:

Dana filtered the sample and larger granules of the sample were left behind.

Explanation:

If a substance is pure, it will have a uniform composition throughout. It will not separate into particles of various sizes.

One of the characteristics of pure substances is that they are homogeneous. A mixture is definitely made up of particles of various sizes.

Since the particles was filtered and larger granules were left behind, the sample has been separated by a physical method (filtration). Only a mixture can be separated by physical methods. It is not a pure substance.

5 0
3 years ago
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