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Nadusha1986 [10]
3 years ago
6

BRAINLIEST ANSWER COME FAST CHEMISTRY PLZ HELP ME!!

Chemistry
2 answers:
mars1129 [50]3 years ago
4 0

Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.


And I don't see any of the particles. so I can only answer the first one.




Katen [24]3 years ago
3 0

<u>Answer:</u> Both particles are inside the nucleus of the atom.  

<u>Explanation:</u>

There are 3 subatomic particles present in an atom. They are: protons, electrons and neutrons.

  • <u>Protons:</u> They carry positive charger and are found in nucleus.
  • <u>Electrons:</u> They carry negative charge and are found around the nucleus.
  • <u>Neutrons:</u> They dos not carry any charge and are found in nucleus.

<u>We are given:</u>

Particle P is non-charged particle. So, the particle is neutron

Particle Q has a positive charge on it. So, it is a proton.

Hence, both particles are inside the nucleus of the atom.

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An air tight freezer measures 4 mx 5 m x 2.5 m high. With the door open, it fills with 22 °C air at 1 atm pressure.
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P=1 atm * \frac{101,325Pa}{1atm}=101,325 Pa\\\\ T=22+273.15=293.15^{\circ}K

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\rho_{air}=\frac{P}{R*T}=\frac{101325Pa}{287.05 J/(kg*K)*293.15K} =1.204 \frac{kg}{m3}

(b) To calculate the change in pressure, we use again the Ideal Gas law, expressed in another way:

PV=nRT\\P/T=nR/V=constant\Rightarrow P_{1}/T_{1}=P_{2}/T_{2}\\\\P_{2}=P_{1}*\frac{T_{2}}{T_{1}}=101325Pa*\frac{7+273.15}{22+273.15}=101,325Pa*0.9254=93,772Pa\\\\P2=93,772 Pa*\frac{1mmHg}{133,322Pa}= 0.703 mmHg

(c) To calculate the force needed to open we have to multiply the difference of pressure between the inside of the freezer and the outside and the surface of the door. We also take into account that Pa = N/m2.

F=S_{door}*\Delta P=2m^{2} *(101325Pa - 93772Pa)=2m^{2} *7553N/m2=15106N

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