Tag: general introduction: importance and scope of chemistry

Water at $30^{\circ}C$ is liquid and it remains in liquid state from $0^{\circ}C$ to $100^{\circ}C$.

To convert from the Celsius scale to the Kelvin scale, we add $273$ to the Celsius scale. So, $-273+273=0\ K$

The S.I. unit of length is metre.

The atmospheric pressure at sea level is 1 atm.

The formula for conversion of centigrade unit to kelvin is :

Water boils at $100^{\circ}C$ and it converts into vapour above this temperature.

The S.I. unit of weight is newton since weight is the reaction force of an object due to gravity. 

To convert from Celsius scale to Kelvin scale, add 273 to Celsius scale.

$Density= \cfrac {mass}{volume}= \cfrac {15g}{2ml}= 7.5\quad g/ml$