Advertisements
Advertisements
प्रश्न
Define mole. What are the two things that a mole represents.
Advertisements
उत्तर
Mole can be defined as, the amount of a pure substance, containing the same number of atoms, molecules or ions as present in 12g of carbon. This refers to the value of 6.022 × 1023 atoms, molecules or ions of a substance.
APPEARS IN
संबंधित प्रश्न
Choose the correct answer from the options given below:
The ratio between the number of molecules in 2g of hydrogen and 32g of oxygen is:
[Given that H = 1, O = 16]
If the aluminium salt of an anion X is Al2X3, what is the valency of X ? What will be the formula of the magnesium salt of X ?
Fill in the following blanks :
64 g of oxygen gas contains ................ moles of oxygen atoms.
Deduce the number of molecules of the following compound in the given quantity.
32g oxygen
Calculate the number of moles and number of molecules present in 1.4 g of ethylene gas. What is the volume occupied by the same amount of ethylene?
Define the term:
Relative molecular mass
Which of the following weighs the least?
Correct the statement, if required.
The relative atomic mass of an element is the number of times one molecule of an element is heavier than `1/12` the mass of an atom of C12.
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.
The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 g. Compute the mass of an electron.
