3 years ago

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

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

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Cellular respiration

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

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Isotopes of the same element have different numbers of protons electrons neutrons

MrRa [10]

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

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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

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Answer : 1.12 grams

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6.130 - 5.010 = 1.12

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The track along which electricity flows is called a: fuse circuit switch

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It is called a circuit.

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