Advertisements
Advertisements
प्रश्न
Washing soda has the formula Na2CO3.10H2O.What is the mass of anhydrous sodium carbonate left when all the water of crystallization is expelled by heating 57.2 g of washing soda?
Advertisements
उत्तर
\[\ce{Na2CO3.10H2O ->[\Delta] Na2CO2 + 10H2O}\]
molecular weight of washing soda is 286.14g
molecular weight of sodium carbonate is 106g
286.14g of Na2CO3. 10H2O forms 106g of sodium carbonate on heating 57.2 g of Na2CO3. 10H2O forms = 106 X 57.2/286.14 = 21.2g
APPEARS IN
संबंधित प्रश्न
Define the term:
Vapour density
What is the mass of nitrogen in 1000Kg of urea [CO(NH2)2] ?
[H = 1, C= 12, N= 14, O = 16]
What is the vapour density of ethylene? (Avogadro's number = 6 x 1023; Atomic weight of C = 12, H = 1; Molar volume = 22.4 litres at STP)
A compound 'X' consists of 4.8% of C and 95.2% of Br by mass.
Name the type of chemical reaction by which X can be prepared from ethane.
Give two tests of the following:
Oxygen
Calculate the relative molecular mass of:
Potassium chlorate
Calculate the relative molecular mass of:
CHCl3
Which of the following contains maximum number of molecules?
Calculate the mass of nitrogen supplied to soil by 5 kg of urea [CO(NH2)2].
[O = 16; N = 14; C = 12; H = 1]
The vapour density of CH3OH is ______. (At. Wt. C = 12, H = 1, O = 16)
