Advertisements
Advertisements
प्रश्न
The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe?
Advertisements
उत्तर
1 mole of stars = 6.022 × 1023 stars
Number of moles of stars = `10^22/(6.023 xx 10^22)`
= 0.0166 moles
APPEARS IN
संबंधित प्रश्न
Convert into mole.
20 g of water
Fill in the following blanks :
64 g of oxygen gas contains ................ moles of oxygen atoms.
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 u ; O = 16 u)
Calculate the mass in grams of 0.17 mole of hydrogen sulphide, H2S. (Atomic masses : H = 1 u, S = 32 u)
Define the term Relative atomic mass.
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
Four grams of caustic soda contains ______.
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)
How many grams are there in the following?
2 moles of the hydrogen molecule, H2.
