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When Calcium ethynide is decomposed by water, the gas produced is
In the extraction of Aluminium, the silica impurity is removed by
Silver and Gold are metals found as free uncombined elements in the earth's crust, which makes them to be referred to as
The constituents of Alnico are Aluminium, Nickel and
The number of molecules of helium gas contained in 11.5g of the gas is
At a given temperature and pressure, a gas X diffuses twice as fast as gas Y. It follows that
Fe = iron.
Salt in water forms a solution.
Solids have a fixed shape.
Bases turn red litmus blue.
Carbon dioxide = COÎ?.
Thermometer measures temperature.
An atom is the smallest unit of an element.
We breathe in oxygen.
Water boils at 100ÎC.
Gold = Au.
How many moles of copper would be deposited by passing 1 Faraday of electricity through a \(CuCl_2\) solution?
How many grammes of NaOH(s) would be needed to produce 100.0 cm3 of a 0.20 mol dm-3 NaOH, (aq)? [NaOH = 40.0]
Thermal cracking of alkanes usually
The relative molar mass of a gaseous hydrocarbon is 30. Determine its vapour density.