Grade 12th passPhysical Chemistry
the number of atoms in 20g of SO3 is approximately - 1×1023
- 1.5×1023
- 2×1023
- 6×1023
the number of atoms in 20g of SO3 is approximately
- 1×1023
- 1.5×1023
- 2×1023
- 6×1023
4 Answers
Arun
Molecular mass of SO3 --- 32+3x16=80 Unified mass
Molar Mass=80gm
Given weight of SO3=20g
Number moles=given weight/gram molecular weight=20/80=1/4=0.25 moles
Number moles=given weight/gram molecular weight=20/80=1/4=0.25 moles
So 1 mole =80 gm of SO3 contains 6.023x 10²³ moelcules
0.25 moles[20g] conatins -----?
=6.023x10²³x0.25
=1.50x10²³ moleucles
Each moleucle of SO3 has 4 atoms.
so,Total number of atoms in SO3 is 4x1.50x10²³
=6x10²³ atoms
=6.023x10²³x0.25
=1.50x10²³ moleucles
Each moleucle of SO3 has 4 atoms.
so,Total number of atoms in SO3 is 4x1.50x10²³
=6x10²³ atoms
∴Total number of atoms in SO3 is 6x10²³ atoms
Saurabh Koranglekar
Dear student
Moles present in 20 g of SO3 = 20/ 80.07 = 0.2498 mol.
Number of molecules = 0.2498 X 6.022 X 1023 = 1.5 X 1023 molecules.
Each mole of SO3 has 6.022 X 1023 molecules.
Regards
Moles present in 20 g of SO3 = 20/ 80.07 = 0.2498 mol.
Number of molecules = 0.2498 X 6.022 X 1023 = 1.5 X 1023 molecules.
Each mole of SO3 has 6.022 X 1023 molecules.
Regards
Khimraj
79 g of SO3 contains 1 mole of molecules or 4 mole atoms(3 mole atoms of oxygen and 1 mole atoms of sulphur).
So,Number of atoms in20 g SO3
=4×6.02×10^23×20÷79 = 6×10^23
Answer=6 × 10^23
Answerian
Molecular mass of SO3 = 32+3x16=80 Unified mass
Molar Mass = 80g
Given weight of SO3 = 20g
Number moles = given weight/gram molecular weight
Number moles = given weight/gram molecular weight
=20/80=1/4
=0.25 moles
So;
1 mole = 80 g of SO3 contains 6.023 x 10²³ moelcules
0.25 moles[20g] conatins = ?
= 6.023x10²³ x 0.25
= 1.50x10²³ moleucles
Each moleucle of SO3 has 4 atoms.
So,
Each moleucle of SO3 has 4 atoms.
So,
Total number of SO3 atoms are = 4 x 1.50x10²³
=6x10²³ atoms
∴Total number of atoms in SO3 are = 6x10²³ atoms
Other Related Questions on physical chemistry
Which of the following aqueous solutions remains neutral after
electrolysis
Which of the following aqueous solutions remains neutral after
electrolysis
electrolysis
physical chemistry
Last Activity: 3 Years ago
In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???
physical chemistry
Last Activity: 3 Years ago
True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2
True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2
physical chemistry
Last Activity: 3 Years ago
18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture
18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture
physical chemistry
Last Activity: 4 Years ago