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.
Advertisements
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
What is the mass of 0.2 mole of oxygen atoms ?
How many moles of oxygen atoms are present in one mole of the following compounds ?
- Al2O3
- CO2
- Cl2O7
- H2SO4
- Al2(SO4)3
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
What is the value of Avogadro's number?
A flask contains 3.2g of sulphur dioxide.Calculate the following : The moles of sulphur dioxide present in the flask.
Calculate the number of moles and number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
Define the term:
Gram atom
Calculate the number of molecules in one Kg of calcium chloride.
How many grams of Al are present in 0.2 mole of it?
Calcium chloride when dissolved in water dissociates into its ions according to the following equation.
\[\ce{CaCl2} (aq) → {Ca^{2+} (aq) + 2{Cl}- (aq)}\]
Calculate the number of ions obtained from CaCl2 when 222 g of it is dissolved in water.
