25. Calculate the number of particles in:
32 g of O2 molecules
b. 5 moles of calcium atom
a.
Answers
Answer:
no. of particles in oxygen = 6.022 × 10^23
no. of particles in calcium atom = 5× 6.022× 10^23
Explanation:
As we know, formula, no. of moles =given mass/ molar mass. and 1 mole contains avagadro's number of particles(6.022×10^23).
therefore, in first case, oxygen, given mass = 32g
molar mass of oxygen = 16×2 = 32g
no. of moles = 32/32 = 1 mole and 1 mole contain 6.022×10^23 no. of particles.
in second case, 1 mole contain 6.022×10^23 no. of particles
5 mole contain 5× 6.022×10^23 = 30.110 × 10^23 no. of particles.
Answer:
no. of particles in oxygen = 6.022 × 10^23
no. of particles in calcium atom = 5× 6.022× 10^23
Explanation:
As we know, formula, no. of moles =given mass/ molar mass. and 1 mole contains avagadro's number of particles(6.022×10^23).
therefore, in first case, oxygen, given mass = 32g
molar mass of oxygen = 16×2 = 32g
no. of moles = 32/32 = 1 mole and 1 mole contain 6.022×10^23 no. of particles.
in second case, 1 mole contain 6.022×10^23 no. of particles
5 mole contain 5× 6.022×10^23 = 30.110 × 10^23 no. of particles.