Calculate the number of molecules of sulphur `(S_8)` present in 16g of solid sulphur.

Calculate the number of moles is 60g NaOH.

Calculate the number of moles in 10g of CH_4 .

Calculate the number of alumnium ions present in 0.051 g of aluminium oxide.

How many water molecules are present in 18g of water?

What would be the electron dot structure of molecule of sulphur which is made up of eight atoms of sulphur?

The activation energy of a reaction 2H I_(g) rarrH_2 + I_(2(g)) is 209.5 kJ mol^-1 at 581K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy?

An ambulance blowing a siren of frequency 700 Hz is travelling towards a wall with a speed 2 m(s)^-1.Calculate the number of beats heard in one second by the driver of the ambulance.(velocity of sound = 350 m(s)^-1 )

What is meant by significant figures? State the number of significant figures present in the following expressions:-0.0036g