0.0075 mole of calcium trioxocarbonate (IV) is added to 0...
0.0075 mole of calcium trioxocarbonate (IV) is added to 0.015 mole of a solution of hydrochloric acid. The volume of gas evolved at s.t.p is?
[Molar volume of a gas at s.t.p = 22.4 dm3]
224cm3
168cm3
112cm3
100cm3
Correct answer is B
1mole of gas at STP = 22.4dm\(^3\)
0.0075 mole of CaCO3 = xdm\(^3\)
cross multiply;
where 22.4dm\(^3\) = 22400cm\(^3\)
x * 1 = 0.0075 * 22400 → 168cm\(^3\)
the gas CO2 which evolved was gotten from CaCO3 so we use the number of moles of CaCO3 only
Which of the following metallic oxides is amphoteric? ...
A gas exerts pressure on its container because ...
CxHY + 4O2 → 3CO2 + 2H2O. The hydrocarbon, CxHY, in the reaction above is?...
For the general equation of the nature xP + yQ ⇌ mR + nS, the expression for the equilibrium cons...
What is the chemical symbol for Iridium? ...
Which of the following pairs of substance will react further with oxygen to form a higher oxide? ...
In the extraction of iron, the waste gas from the furnace is a mixture of ...
Which of the following elements can conveniently be placed in two groups in the periodic table ? ...