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प्रश्न
Define or explain the term:
Relative atomic mass
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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.
संबंधित प्रश्न
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)
What weight of each element is present in 1.5 moles of sodium sulphite, Na2SO3 ?
(Atomic masses : Na = 23 u ; S = 32 u ; O = 16 u)
Which of the following correctly represents 360 g of water ?
- 2 moles of H2O
- 20 moles of water
- 6.022 × 1023 molecules of water
- 1.2044 × 1025 molecules of water
Explain the term:
Mole
Fill in the blank.
One a.m.u. is the mass of ______ atom of C12.
Two oxides of a metal (M) have 20.12% and 11.19% oxygen. The formula of the first oxide is MO. Determine the formula of the second oxide.
Find the number of molecules in 3.2 g of SO2.
Calculate the number of molecules in one Kg of calcium chloride.
Calculate the mass of 0.1 mole of the following:
Na2SO4.10H2O
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
