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Aneli [31]
3 years ago
11

Need helpppp please

Chemistry
1 answer:
Vladimir79 [104]3 years ago
6 0

Answer:

message me so i can help you because i cant see the words

Explanation:

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True or false: Observing a physical property of a substance will change the substances' identity I NEEED HELLLPPPPP NOOOWWWW !!!
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Answer:

false

Explanation:

a physical property can be observed and stay the same but a chemical property can't

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4 years ago
A sample of gas in a closed container at a temperature of 76°c and a pressure of 5.0 atm is heated to 399°c. What pressure does
NikAS [45]

<u>Answer:</u> The pressure that the gas exert at high temperature is 9.63 atm

<u>Explanation:</u>

To calculate the final pressure of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\frac{P_1}{T_1}=\frac{P_2}{T_2}

where,

P_1\text{ and }T_1 are the initial pressure and temperature of the gas.

P_2\text{ and }T_2 are the final pressure and temperature of the gas.

We are given:

P_1=5.0atm\\T_1=76^oC=[76+273]K=349K\\P_2=?\\T_2=399^oC=[273+399]K=672K

Putting values in above equation, we get:

\frac{5.0atm}{349K}=\frac{P_2}{672K}\\\\P_2=9.63atm

Hence, the pressure that the gas exert at high temperature is 9.63 atm

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