How many moles of argongas contain 7.52 x 1022 ar atoms? a) 0.125 mol ) 1.25 mol c) 0.0801 mol d) on mol e) 0.0125 mol

0.1248 moles

Explanation:

Data provided:

Number of atoms of argon gas = 7.52 × 10²² atoms

Now,

1 mole of argon gas contains 6.023 × 10²³ atoms

Thus, by the concept of the unitary method

1 atoms = (1 / 6.023 × 10²³) moles

therefore,

7.52 × 10²² atoms of argon will be contained by

= (1 / 6.023 × 10²³) × 7.52 × 10²² moles

= 0.1248 moles

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.