Given sample of 1 c.c. of hydrogen and `1 cm^3` of oxygen both at NTP. Which sample has larger number of molecules.

A vessel of volume V contains a mixture of 1 mole of Hydrogen and 1 mole of Oxygen (both considered as ideal). Let f_1 (v) dv, denote the fraction of molecules with speed between v and (v + dv) with f_2 (v) dv, similarly for oxygen. Then

In water molecule the ratio by mass in which hydrogen and oxygen react is 1 : 8, Calculate the ratio by number of atoms in water molecules.

Calculate the number of molecules in 1ml of O2 at NTP.

Calculate number of molecules in 1ml of CO2 at NTP.

The screws produced by a certain machine were checked by examining samples of 7. The following table shows the distribution of 128 samples according to the number of defective items they contained. Fit a binomial distribution and find the expected frequencies if the chance of screw being defective is 1/2 . Also find the mean and variance of the fitted distribution.

A box contains equal number of molecules of hydrogen and oxygen. If there is a fine hole in the box then which gas will leak rapidly and why?

One ticket is drawn at random from a bag containing 24 tickets numbered 1 to 24. Represent the sample space and the event of drawing a ticket containing number which is a prime. Also, find the number of elements in them.

The kinetic energy of 1g for hydrogen a 27^@C will be

From a lot of 10 bulbs which include 3 defectives, a sample of 2 bulbs is drawn at random. Find the probability distribution of the number of defective bulbs.

A given sample of pure compound contains 9.81 g of Zn, 1.8xx10^(23) atoms of chromium, and 0.60 mol of oxygen atoms. What is the simplest formula?