Relative viscosity of a liquid with respect to `H_2O` is measured using Ostwald’s viscometer. Time of flow of the given volume through a fine capillary was 60 s with water and 80 s with the liquid. 25 mL of the liquid weighed 28 g while 25 mL of `H^2O` weighed 25 g. What is relative viscosity of the liquid ?

H_2O is liquid but H_2S is gas why?

Coefficient of viscosity of two liquids are eta_1 and eta_2 . The volume of those liquids flowing through a horizontal pipe for a fixed interval of time are v_1 and v_2 respectively. Then

A gas bubble of 2 cm diameters rises through a liquid of density 1.75 g. cm^-3 with a fixed speed of 0.35cm. s^-1 . Neglect the density of the gas. The coefficient of viscosity of the liquid is

In a mixture of O_(2) and an unknown gas, the percentage of the unknown gas is 20% by mass. At a given temperature and pressure, time required to effuse V mL of the gas mixture through an aperrture is 234.1 s. under the same conditions, time required to effuse the same volume of pure O_(2) gas is 223.1 s. what is the molar mass of unknown gas?

H_(2)O is a liquid but H_(2)S is a gas-why?

H_2O liquid, but H_2S gas in room temperature. - Why ?

The coefficient of viscosity of a liquid flowing through a narrow tube is given by eta=(pipr^(4))/(8Vl) where r and l are the radius and the length of the tube p is the pressure difference between its two ends and V is the volume of liquid flowing per unit time. Here the values of p,r,V and l are 75 cm Hg, 0.35 cm, 1.5 cm^(3)//s and 20.5 cm. respectively , the errors in their measurement are 0.1 cm Hg. 0.01 cm, 0.1 cm^(3)//s and 0.1 cm. respectively. Estimate the percentage error in the computed value of eta .