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प्रश्न
Fill in the following blanks :
0.5 mole of calcium element has a mass of ............... .
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उत्तर
0.5 moles of calcium element have a mass of 20g.
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संबंधित प्रश्न
What is the mass of 1 mole of nitrogen atoms?
What is the mass of 0.2 mole of oxygen atoms?
Which of the following pair of elements represents a mole ratio of 1 : 1 ?
Fill in the blank
Avogadro's number is equal to ______
The equation for the burning of octane is:
\[\ce{2C8H18 + 25O2 -> 16CO2 + 18H2O}\]
How many moles of carbon dioxide are produced when one mole of octane burns?
Calculate the number of moles of methane in 0.80 g of methane.
The molecular formula for elemental sulphur is S8.In a sample of 5.12 g of sulphur:
How many molecules and atoms are present?
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.
N2 + 3H2 → 2NH3
(The atomic mass of nitrogen is 14, and that of hydrogen is 1)
1 mole of nitrogen (______ g) +
3 moles of hydrogen (______ g) →
2 moles of ammonia (______ g)
The number of atoms present in 0.1 mole of P4 (at. mass = 31) is ______.
