3 years ago

True or false? dry ice subliming (turning from a solid straight into a gas) is an example of a chemical change.

1 answer:

5 0

False because when a substance changes from one state of matter to another it is a physical change no matter how many states of matter it skips

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Drfine npk fertilizer.

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How to find the mole fraction of each gas in the vessel after the reaction

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A 200.-milliliter sample of CO2(g) is placed in a sealed, rigid cylinder with a movable piston at 296 K and 101.3 kPa. Determine

bagirrra123 [75]

Answer:

The final volume of the sample of gas $V_{2}$ = 0.000151 $m^{3}$

Explanation:

Initial volume $V_{1}$ = 200 ml = 0.0002 $m^{3}$

Initial temperature $T_{1}$ = 296 K

Initial pressure $P_{1}$ = 101.3 K pa

Final temperature $T_{2}$ = 336 K

Final pressure $P_{2}$ = K pa

Relation between P , V & T is given by

$P_{1} \frac{V_{1} }{T_{1} } = P_{2} \frac{V_{2} }{T_{2} }$

Put all the values in the above equation we get

$101.3 (\frac{0.0002}{296} )= 152 (\frac{V_{2} }{336} )$

$V_{2}$ = 0.000151 $m^{3}$

This is the final volume of the sample of gas.

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4 years ago

Which two factors are used to calculate the kinetic energy of an object?

muminat

Answer:

Mass and Velocity

Explanation:

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Which of the following tells you the number of molecules in 1 mole of a gas?

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Answer:

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Explanation:

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