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HNO 3 + 2 H 2 SO 4 ⇌ [NO 2] + + [H 3 O] + + 2 HSO − 4; Equilibrium constant: K ≈ 22 The nitronium ion , [NO 2 ] + , is the active reagent in aromatic nitration reactions. Since nitric acid has both acidic and basic properties, it can undergo an autoprotolysis reaction, similar to the self-ionization of water :
It has a density of up to 150 g/cm 3 [61] [62] (about 150 times the density of water) and a temperature of close to 15.7 million kelvin (K). [62] By contrast, the Sun's surface temperature is about 5800 K. Recent analysis of SOHO mission data favors the idea that the core is rotating faster than the radiative zone outside it. [60]
Chemist Linus Pauling first developed the hybridisation theory in 1931 to explain the structure of simple molecules such as methane (CH 4) using atomic orbitals. [2] Pauling pointed out that a carbon atom forms four bonds by using one s and three p orbitals, so that "it might be inferred" that a carbon atom would form three bonds at right angles (using p orbitals) and a fourth weaker bond ...
The closest thing to a perfect fighting machine that the Decepticons have. As a warrior he has no equal; as a weapon he has no restraints. [178] His actions result from seemingly savage, animal instinct. Can lift 500 tons; reacts to any movement he sees within .002 seconds. Can generate protective electric field. Wields powerful x-ray laser cannon.
After that, from 1 September 1972, only Celsius measurements were given for temperature. [ 10 ] [ 11 ] Similarly, wind speed was reported only in kilometres per hour (km/h) from 1 April 1973 and rainfall was reported in millimetres – with river depths, snow depths and waves reported in metres – from 1 January 1974.
The Acts of Union 1707 declared that the Kingdom of England and Kingdom of Scotland were "United into One Kingdom by the Name of Great Britain". [p] [22] The term "United Kingdom" has occasionally been used as a description for the former Kingdom of Great Britain, although its official name from 1707 to 1800 was simply "Great Britain". [23]
India, officially the Republic of India, [j] [21] is a country in South Asia.It is the seventh-largest country by area; the most populous country from June 2023 onwards; [22] [23] and since its independence in 1947, the world's most populous democracy.
The Mumbai–Ahmedabad corridor, along with five other high-speed rail corridors, was introduced for a feasibility study in the 2009–2010 Rail Budget.A 650 km (400 mi) long high-speed rail corridor was proposed to run from Pune to Ahmedabad via Mumbai.