At temperatures above roughly 800 °c, calcium carbonate will decompose. write and balance the equation for this reaction. phase symbols are optional.

Answer;

Decomposition of calcium carbonate

CaCO3(s) → CaO(s) + CO2(g)

Explanation;Decomposition reactions are types of reaction that occurs when a reactant is broken down into two or more products. Decomposition may either be thermal where heat is used to break a reactant or may be catalytic where a catalyst is used to break down a reactant to yield two or more substance, for example decomposition of hydrogen peroxide.All metal carbonates decompose to produce a metal oxide and carbon dioxide gas.Calcium carbonate undergoes thermal decomposition to form calcium oxide and carbon dioxide. The equation will be;

CaCO3(s) → CaO(s) + CO2(g)

The equation is balanced as the number of atoms of each element are equal on both side.

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.