Advertisements
Advertisements
प्रश्न
Which one of the following represents 180 g of water?
विकल्प
5 Moles of water
90 moles of water
`(6.022 xx 10^23)/180` molecules of water
6.022 × 1024 molecules of water
Advertisements
उत्तर
6.022 × 1024 molecules of water
Explanation:
No. of moles of water present in 180 g
= `"Mass of water"/"Molar mass of water"`
= `(180 "g")/(18 "g mol"^-1)`
= 10 moles
One mole of water contains = 6.022 × 1023 water molecules
10 mole of water contains = 6.022 × 1023 × 10
= 6.022 × 1024 water molecules
APPEARS IN
संबंधित प्रश्न
The number of molecules in 22.4 cm3 of nitrogen gas at STP is ______.
Solve problem:
Calculate the number of an atom of the following (Given: Atomic mass of I = 127 u).
254 u of iodine (I)
Solve problem:
Arjun purchased 250 g of glucose (C6H12O6) for Rs 40. Find the cost of glucose per mole.
Solve problem:
Calculate the number of atoms of the following. (Average atomic mass : N = 14 u, S = 32 u)
1.6 g of sulfur
Explain the need of the term average atomic mass.
An element X has the following isotopic composition 200X = 90%, 199X = 8% and 202X = 2%. The weighted average atomic mass of the element X is closest to
An element has a bee structure with cell edge of 288 pm. The density of element is 7.2 g cm-3. What is the atomic mass of an element?
The unit of atomic mass, amu is replaced by u, here u stands for ______.
Calculate mass of 3.01 × 1024 atoms of an element having atomic mass 21.13.
Which symbol replaces the unit of atomic mass, amu?
