Answer : The final pressure of the gas is, 
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
or,
where,
= initial pressure = 545 mmHg
= final pressure = ?
= initial volume = 775 mL
= second volume = 171 mL
Now put all the given values in the above equation, we get:
Therefore, the final pressure of the gas is,
<span>Fe2O3 + 3CO --> 2Fe + 3CO2
</span><span>
m(Fe2O3)=213 g
m(CO)=140 g
</span>_______________
<span>n(Fe2O3)=?
m(Fe)=?
n(Fe2O3)=?
n(CO)=?
n(CO2)=?
</span>
<span>n(Fe2O3)=m(Fe2O3) / M(Fe2O3)
n(Fe2O3)= 213 g / 159,7 gmol-1 = 1,33 mol
</span>
<span>n(CO)= m(CO) / M(CO)
n(CO)= 140 g / 28,01 gmol-1 = 4,99 mol</span>
Answer:
4.1 * 10^-22 J
The wave belongs to the infra red portion of the electromagnetic spectrum.
Explanation:
From the formula;
E = hc/λ
We know that;
h= plank's constant = 6.6 * 10^-34 Js
c= speed of light = 3 * 10^8 m/s
λ = wavelength of the wave = 4.80 x 10^5 nm or 4.80 x 10^-4 m
Hence;
E= 6.6 * 10^-34 * 3 * 10^8/ 4.80 x 10^-4
E= 4.1 * 10^-22 J
The wave belongs to the infra red portion of the electromagnetic spectrum.
True
Explanation:
The mass of an electron is 9.11 x 10⁻³¹kg. It is the lightest subatomic particle compared the protons and neutrons.
Protons weighs 1.67 x 10⁻²⁷kg
Neutrons weighs 1.68 x 10⁻²⁷kg
- Electrons carry negative charges.
- They were first discovered by J.J Thomson where he called them cathode rays.
- They occupy the regions in space around the nucleus.
- The regions consists of orbitals and are called sublevels or subshells.
learn more:
Subatomic particles brainly.com/question/2757829
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Answer:
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