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The relative formula mass (Mr) of a compound is the sum of the relative atomic masses of the atoms in the numbers shown in the formula.

Relative formula mass (Mr) of CaCO3 = 40+12+(3x16)=100.

First, it depends on whether the forward reaction is exothermic or endothermic. Lets use the formation of ammonia as an example: N2 + 3H2 <-> 2NH3. The forward reaction is exothermic, so it releases...

In a dynamic equilibrium the rate of the forward reaction is the same as the rate of the reverse reaction and there is no overall change in the amount of each product.

The electrons are transferred from potassium to sulphur, in this reaction, potassium is being oxidised and sulphur is being reduced. Two potassium atoms each lose one electron forming K+ ions. Sulphur gai...

advantages: . combustion only leads to water production, no pollutants . no carbon dioxide, so no greenhouse gases . no sulfur dioxide so no acid rain . releases more energy so more efficent . renewable d...