Advertisements
Advertisements
प्रश्न
Determine the number of molecules in a drop of water which weighs 0.09 g.
Advertisements
उत्तर
18 g of water has number of molecules = 6.02 x 1023
∴ 0.09 g of water will have no. of molecules = `(6.02 xx 10^23)/18 xx 9/100`
= 3.01 x 1021 molecules
APPEARS IN
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Phosphorus molecule, P4 (atomic mass of phosphorus = 31)
Which of the following pair of elements represents a mole ratio of 1 : 1 ?
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
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
Find the number of moles in 10 g of CaCO3.
How many grams of HCl are present in 0.1 mole of it?
A student puts his signature with a graphite pencil. If the mass of carbon in the signature is 10-12 g, calculate the number of carbon atoms in the signature.
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
The number of atoms present in 0.1 mole of P4 (at. mass = 31) is ______.
