Advertisements
Advertisements
प्रश्न
Deduce the number of molecules of the following compound in the given quantity.
90g water
Advertisements
उत्तर
Number of moles in water = `"Mass of water in grams"/"Molecular mass of water"`
= `90/18`
= 5 moles
∴ 5 moles of H2O contains = 5 × 6.022 × 1023 molecules = 30.11 × 1023 molecules.
The number of molecules in 90 grams of water is 3.01 × 1024.
APPEARS IN
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Sulphur molecule, S8
What is the mass of 10 moles of sodium sulphite (Na2SO3)?
Convert into mole.
12 g of oxygen gas
What is the mass of 0.5 mole of water molecules?
Calculate the number of moles in 12g of oxygen gas.
One of the following elements has an atomicity of ‘one’. This element is :
Fill in the following blanks :
0.5 mole of calcium element has a mass of ............... .
What is the mass of 5 moles of sodium carbonate (Na2CO3) ?
(Atomic masses : Na = 23 u ; C = 12 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
Fill in the blank
Avogadro's number is equal to ______
Calculate the number of molecules in 12.8g of sulphur dioxide gas. Take Avogadro's number as 6 x 1023.
[S = 32, 0 = 16 ]
How many grams of HCl are present in 0.1 mole of it?
How many grams of H2O are present in 0.2 mole of it?
How many grams of CO2 is present in 0.1 mole of it?
Calculate the number of atoms in the following:
52 amu of He
Cost of Sugar (C12H22 O11) is Rs 40 per kg; calculate its cost per mole.
Correct the statement, if required.
One mole of chlorine contains 6.023 x 1010 atoms of chlorine.
1 mole of any substance contains ______ molecules.
How many grams are there in the following?
3 moles of chlorine molecule, Cl2.
Cinnabar (HgS) is a prominent ore of mercury. How many grams of mercury are present in 225 g of pure HgS? Molar mass of Hg and S are 200.6 g mol–1 and 32 g mol–1 respectively.
