Chemical formula that compound will be made up of the same elements in the same proportion or ratio. For example, any water molecule is always made up of two hydrogen atoms and one oxygen atom in a 2:1 ratio. If we look at the relative masses of oxygen and hydrogen in a water molecule, we see that 94% of the mass of a water molecule is accounted for by oxygen and the remaining 6% is the mass of hydrogen. This mass proportion will be the same for any water molecule. The alkene called but-2-ene has two isomers, which the chemical formula CHCH=CHCH
The wrong type of snow claimed to be ready for the coming snow. However, the snow – which was not deep enough for snowploughs or snow blowers to be effective – was unusually soft and powdery, finding its way into electrical systems and causing short circuits and traction motor damage in trains. For traction motors with integral cooling fans and air intakes pointing downwards – the type that is still common on British electric multiple units – the problem was made worse as the air intakes sucked up the loose snow. Meanwhile, the snow also became packed into sliding door mechanisms and into points, causing