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Lubov Fominskaja [6]
3 years ago
7

Is crushing a rock a chemical or physical change?

Chemistry
1 answer:
aalyn [17]3 years ago
4 0
Physical change because you didn't change the chemical compound 
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The temperature is -14°C the air pressure in an automobile tire is 149K PA if the volume does not change what is the pressure af
Jet001 [13]

Answer: The pressure after the tire is heated to 17.3°C is 167 kPa

Explanation:

To calculate the final temperature 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=149kPa\\T_1=-14^0C=(273-14)=259K\\P_2=?=27.5psi\\T_2=17.3^0C=(273+17.3)=290.3K

Putting values in above equation, we get:

\frac{149}{259}=\frac{P_2}{290.3}\\\\P_2=167kPa

Hence, the pressure after the tire is heated to 17.3°C is 167 kPa

4 0
3 years ago
Which process releases energy by breaking down glucose and other food molecules in the presence of oxygen?
FinnZ [79.3K]
Cellular respiration

is the process that releases energy by breaking down glucose and other food molecules in the presence of oxygen

5 0
3 years ago
Read 2 more answers
Isotopes of the same element have different numbers of<br> protons<br> electrons<br> neutrons
MrRa [10]

Answer:

Protons and electrons

Explanation:

They have a different number of neutrons giving them a different atomic weight while having the same charge

6 0
3 years ago
You pre-weigh a glass vial to hold your sample and find its mass to be 5.010 g. You add your sample to the vial and reweigh it o
san4es73 [151]
Answer : 1.12 grams

Yo find the mass of the sample, you take the increased mass and subtract the original mass.

6.130 - 5.010 = 1.12
8 0
3 years ago
The track along which electricity flows is called a:<br><br> fuse<br> circuit<br> switch
Pavel [41]
It is called a circuit.
4 0
2 years ago
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