Advertisements
Advertisements
Question
How many grams are there in the following?
2 moles of the hydrogen molecule, H2.
Advertisements
Solution
Formula = No. of moles (n) × (Gram molecular mass)
Mass of 2 moles of H2 molecule
= 2 × 2 = 4 g
APPEARS IN
RELATED QUESTIONS
What is the mass of 0.5 mole of water molecules?
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
Explain the term:
Gram atom
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
Consider the following reaction and based on the reaction answer the questions that follow :
\[\ce{(NH4)2Cr2O7 ->[heat] N2(g) + 4H2O(g) + Cr2O3}\]
Calculate :
(i) The quantity in moles of (NH4)2Cr2O7 if 63 gm of (NH4)2Cr2O7 is heated.
(ii) The quantity in moles of nitrogen formed.
(iii) The volume in litres or dm3 of N2evolved at STP.
(iv) The mass in grams of Cr2O3 formed at the same time
[Atomic masses : H = 1, Cr=52, N=14]
Calculate the number of atoms in the following:
52 amu of He
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
Calculate the number of gram atoms in 4.6 gram of sodium.
Calculate the number of moles in 7g of nitrogen.
