Advertisements
Advertisements
Question
Given that the relative molecular mass of copper oxide is 80, what volume of ammonia (measured at STP) is required to completely reduce 120g of copper oxide? The equation for the reaction is :
3CuO + 2NH3 → 3Cu + 3H2O + N2
Advertisements
Solution
3CuO + 2NH3 → 3Cu + 3H2O + N2
Molecular mass of CuO = 80
Volume occupied by 1 mole of NH3 = 22.4L
From the equation :
3 moles of CuO is reduced by 2 moles of ammonia
For 240g of CuO, volume of NH3 consumed = 44.8L
For 120g of CuO, volume of NH3 consumed
= 44.8 x 120 / 240 = 22.4 L
APPEARS IN
RELATED QUESTIONS
Calculate the molar mass of the following substance:
Sulphur molecule, S8
Define mole. What are the two things that a mole represents.
Prove the Following :
One mole of any gas contains th e same number of molecules.
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
What volume of dinitrogen oxide is produced at the same time as 8.96 L of steam?
Explain the term:
Molar volume
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
The molecular formula for elemental sulphur is S8.In a sample of 5.12 g of sulphur:
How many molecules and atoms are present?
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of (NH4)2Cr2O7.
Deduce the number of molecules of the following compound in the given quantity.
7.1 g chlorine
