What Kelvin temperature is equal to -33DC? A) 306K B) -33K C) 240K D) 33K
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Final Answer:
Kelvin Absolute Temperature:
The kelvin, symbol K, is a unit of measurement for temperature. The Kelvin scale is an absolute scale, which is defined such that 0 K is absolute zero, the lowest temperature possible on Earth.
Historically developed from the Celsius scale, the conversion is thus:
And absolute zero, 0 K = -273.15° C, the lowest temperature possible.
Knowing this, we can solve the question as:
To learn more about the Kelvin Absolute Temperature Scale:
The Kelvin temperature equal to -33℃ is 240 K.
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Answer: The correct representation of the element with 15 electrons and 16 neutrons is phosphorus (P).
Explanation:
True
False
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TRUE
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Answers
Molecular Formula = n (Empirical Formula) ----- (1)
Calculating n;
n = Molecular Weight / Empirical Formula Weight --- (2)
Empirical formula weight = (12×3) + (1×7) + (14×1) + (16×1)
Empirical formula weight = (36) + (7) + (14) + (16)
Empirical formula weight = 73
Putting values in Eq. 2,
n = 146 / 73
n = 2
Putting Value of n and Empirical Formula in Eq. 1,
Molecular Formula = 2 × C₃H₇NO
Molecular Formula = C₆H₁₄N₂O₂
Result:
Molecular Formula of Lysine is C₆H₁₄N₂O₂.
Answers
Answer:
Comets are composed of ice, dust and frozen gases. The core of the comet is known as nucleus which is formed of rocks and frozen gases. Coma is the atmosphere of the comet. As the comet enters the inner solar system, the coma expands due to sublimation of frozen gases. As it nears the sun, the coma extends backwards and forms a long tail. It extends backwards due to the solar wind. The charged particles from the sun take away the evaporated material and dust of the comet backwards forming tail.
As a comet approaches the Sun, it starts to heat up. The ice transforms directly from a solid to a vapor, releasing the dust particles embedded inside. Sunlight and the stream of charged particles flowing from the Sun – the solar wind – sweeps the evaporated material and dust back in a long tail.
Given the two formulas representing the same compound:
Which statement describes these formulas?
(1) Formulas A and B are both empirical.
(2) Formulas A nd B are both molecular.
(3) Formula A is empirical and Formula B is molecular.
(4) Formula A is molecular and Formula B is empirical.
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Correct option is (3).
Empirical formula:-Simplest whole number ratio of various atoms present in a compound.
Molecular formula:-The formula that gives the total number of atoms of each element in each molecule of a substance.
So, (formula B) is the molecular formula, and
(Formula A)is the empirical formula.
Hence, the correct option is (3).
To know more about:-
CnH2n
CnH2n-2
And CnN2n+2
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Justification:
Radon (Rn) has atomic number 86. The electron distribution leads to the most stable configuration: the outermost shell (valence shell) is 6s² 6p⁶. That means that it has 8 valence electrons and, therefore, this shell is full. It will not accept more electrons ans will try to keep all of the ones it has.
This is the typical configuration of a noble gas. They are all in the group 18 of the periodic table (the last column). So, as the other noble gases, He, Ne, Ar, Kr, and Xe, Rn is very stable.