Advertisements
Advertisements
Question
Calculate the mass in grams of 0.17 mole of hydrogen sulphide, H2S. (Atomic masses : H = 1 u, S = 32 u)
Advertisements
Solution
Moles of hydrogen sulphide = 0.17
Molar mass of hydrogen sulphide = (2 × 1) + (1 × 32)g = 34g
1 mole of hydrogen sulphide weighs = 34g
Therefore, mass of 0.17 moles of hydrogen sulphide = 34 × 0.17 = 5.78g
Hence, 0.17 moles of hydrogen sulphide weigh 5.78 grams.
APPEARS IN
RELATED QUESTIONS
Calculate the molar mass of the following substance:
Sulphur molecule, S8
Calculate the molar mass of the following substance:
Hydrochloric acid, HCl
What is meant by ‘a mole of carbon atoms’ ?
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?
Complete the following calculations. Show working for complete credit :
Calculate the mass of calcium that will contain the same number of atoms as are present in 3.2 gm of Sulphur. [Atomic masses : S = 32, Ca = 40]
Correct the statement, if required.
Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of atoms.
Calculate the number of gram atoms in 4.6 gram of sodium.
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.
One mole of any gas occupies ______ ml at S.T.P.
If 0.2 mol of the following substance is required how many grams of that substance should be taken?
Calcium carbonate
