The materials which allow heat to pass through them easily are conductors of heat. For examples,aluminum, iron, and copper.
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Efficiency is the estimation of output power by any machine. A 12% efficient engine has an output provided by the input energy of the engine. Thus, option D is correct.
<h3>What is efficiency?</h3>
Efficiency is defined as the energy given by the machine, engine, or any system by utilizing the input power or energy. It is given as,
η = Output ÷ Input × 100%
It is used to know the ability of the machine to transfer the input energy to an external amount of work. The engine with 12% efficiency is said to have produced energy by utilizing the provided 12% input.
Therefore, option D. the 12% of input power is used by the engine to produce the energy.
Learn more about efficiency here:
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<span>Let's </span>assume that water vapor has ideal gas
behavior. <span>
Then we can use ideal gas formula,
PV = nRT<span>
</span><span>Where, P is the pressure of the gas (Pa), V
is the volume of the gas (m³), n is the number
of moles of gas (mol), R is the universal gas constant ( 8.314 J mol</span></span>⁻¹ K⁻¹) and T is temperature in Kelvin.<span>
<span>
</span>P = 1 atm = 101325 Pa (standard pressure)
V = 13.97 L = 13.97 x 10</span>⁻³ m³<span>
n = ?
R = 8.314 J mol</span>⁻¹ K⁻¹<span>
T = 0 °C = 273 K (standard temperature)
<span>
By substitution,
</span>101325 Pa x 13.97x 10</span>⁻³
m³ = n x 8.314 J mol⁻¹ K⁻¹ x 273 K<span>
n = 0.624 mol
<span>
Hence, the moles of water vapor at STP is 0.624 mol.
According to the </span></span>Avogadro's constant, 1 mole of substance has 6.022 × 10²³ particles.
<span>
Hence, number of atoms in water vapor = 0.624 mol x </span>6.022 × 10²³ mol⁻¹
<span> = 3.758 x 10</span>²³<span>
</span>
Answer:
Ammonium Ion (NH4+)
Explanation:
The chemical name for NH4 is ammonium.
Answer:
sodium chloride—is NaCl.
Explanation:
Table salt is an ionic compound, which breaks into its component ions or dissociates in water. These ions are Na+ and Cl-. The sodium and chlorine atoms are present in equal amounts (1:1 ratio), arranged to form a cubic crystal lattice.
