A solid A on heating erupts in the form of volcano to form compound B and two gases C and D. D is allowed to collect can be condensed to a colourless liquid.
i)Identify A B C D
ii)Give balance equation for the reaction
iii)What is the colour of B.
Answers
1) A Feso⁴ (Ferrous Sulphate)
B Fe²O³ (Ferric Oxide)
C So². (Sulphur Dioxide)
D So³. (Sulphur Trioxide)
2) 2FeSo⁴→ Fe²O³ + So² + So³
3) It is reddish in colour.
The plural of formula can be either formulas (from the most common English plural noun form) or, under the influence of scientific Latin, formulae (from the original Latin).[2]
In mathematics, a formula generally refers to an identity which equates one mathematical expression to another, with the most important ones being mathematical theorems.[3] Syntactically, a formula is an entity which is constructed using the symbols and formation rules of a given logical language.[4] For example, determining the volume of a sphere requires a significant amount of integral calculus or its geometrical analogue, the method of exhaustion.[5] However, having done this once in terms of some parameter (the radius for example), mathematicians have produced a formula to describe the volume of a sphere in terms of its radius: