Advertisements
Advertisements
प्रश्न
Cinnabar (HgS) is a prominent ore of mercury. How many grams of mercury are present in 225 g of pure HgS? Molar mass of Hg and S are 200.6 g mol–1 and 32 g mol–1 respectively.
उत्तर
Molar mass of HgS = 200.6 + 32 = 232.6 g
Mass of Hg in 232.6 g of HgS = 200.6 g
Mass of Hg in 225 g of HgS = `(200.6)/(232.6) xx 225`
= 194.04 g
APPEARS IN
संबंधित प्रश्न
Calculate the percentage of water of crystallization in CuSO4.5H2O
(H = 1, O = 16, S = 32, Cu = 64)
Fill in the following blanks :
60 g of carbon element are .............. moles of carbon atoms.
What weight of each element is present in 1.5 moles of sodium sulphite, Na2SO3 ?
(Atomic masses : Na = 23 u ; S = 32 u ; O = 16 u)
Define the term Relative atomic mass.
Explain the term : Gram mole
A flask contains 3.2g of sulphur dioxide.Calculate the following : The moles of sulphur dioxide present in the flask.
Define or explain the term:
Molar volume
Define or explain the term:
Mole
Calculate the number of moles in 7g of nitrogen.
Solid ammonium dichromate decomposes as:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate the quantity in moles of nitrogen formed.
