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प्रश्न
Define or explain the term:
Relative atomic mass
उत्तर
The relative atomic mass of an element is the number of times one atom of the element is heavier than `1/12` times of the mass of an atom of carbon-12.
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संबंधित प्रश्न
A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure
1) Find the number of moles of hydrogen present.
2) What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)
3) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder under the same conditions of temperature and pressure.
4) State the law that helped you to arrive at the above result.
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)
Fill in the blank
One gram atom of an element contains ______ atoms.
A student puts his signature with graphite pencil. If the mass of carbon in the signature is 10-12 g. Calculate the number of carbon atoms in the signature.
Given that the relative molecular mass of copper oxide is 80, what volume of ammonia (measured at STP) is required to completely reduce 120g of copper oxide? The equation for the reaction is :
3CuO + 2NH3 → 3Cu + 3H2O + N2
Correct the following statement :
Equal masses of all gases under identical conditions contain the same number of molecules.
Which of the following would weight the least?
[Atomic masses : Ag = 108, N - 14, O = 16,C = 12]
Define or explain the term:
Molar volume
Calculate the number of molecules in one Kg of calcium chloride.
Calculate the number of moles of methane in 0.80 g of methane.
