Advertisements
Advertisements
प्रश्न
Calculate the empirical formula of the compound having 37.6% sodium, 23.1% silicon and 39.3% oxygen.(Answer correct to two decimal places) (O = 16, Na = 23, Si = 28)
Advertisements
उत्तर
| Element | Atomic mass | Percentage | Relative number of moles | Simplest mole ratio | Whole number ratio |
| Na | 23 | 37.6 | 37.6/23 = 1.63 | 1.63/0.83 = 1.9 | 2 |
| Si | 28 | 23.1 | 23.1/28 = 0.83 | 0.83/0.83 = 1 | 1 |
| O | 16 | 39.3 | 39.3/16 = 2.45 | 2.45/0.83 = 2.9 | 3 |
So the empirical formula of the compound is Na2SiO3.
APPEARS IN
संबंधित प्रश्न
A gaseous hydrocarbon contains 82.76% of carbon. Given that its vapor density is 29, find its molecular formula. [C = 12, H = 11]
Ethane burns in oxygen to form CO2 and H2O according to the equation:
`2C_2H_6+7O_2 -> 4CO_2 + 6H_2O`
If 1250 cc of oxygen is burnt with 300 cc of ethane.
Calculate:
1) the volume of `CO_2` formed
2) the volume of unused `O_2`
Explain the terms empirical formula and molecular formula.
Give example of compound whose:
Empirical formula is the same as the molecular formula.
Determine the empirical formula of a compound containing 47.9‰ K, 5.5‰ beryllium and 46.6‰ fluorine by mass.
Find the percentage of mass water in Epsom salt MgSO4.7H2O.
A compound has the following percentage composition by mass: carbon 14.4%, hydrogen 1.2% and chlorine 84.5%. Determine the empirical formula of this compound. Work correctly to 1 decimal place. (H = 1; \[\ce{C}\] = 12; \[\ce{Cl}\] = 35.5)
The Empirical formula of an organic compound is CHCl2.
If its relative molecular mass is 168, what is its molecular formula?
[At. Wt. C = 12, H = 1, Cl = 35.5]
Calculate:
Write the empirical formula of C8H18.
A compound has the following percentage composition by mass: carbon 14.4%, hydrogen 1.2% and chlorine 84.5%. By what type of reaction could this compound be obtained from ethylene?
