The following data were obtained when dinitrogen and dioxygen react together to form different compounds:
Mass of dinitrogen Mass of dioxygen
(i) 14g 16g
(ii) 14g 32g
(iii) 28g 32g
(iv) 28g 80g
which law of chemical combination is obeyed by the above experimental data? Give its statement?
Molar mass of sugar
Number of moles of sugar = Molar concentration (molarity)
Pressure is determined as force per unit area of the surface. The SI unit of pressure, pascal is as shown below:
1 Pa = 1N m–2
If mass of air at sea level is 1034 g cm–2, calculate the pressure in pascal.
Molar mass of methanol (CH3OH)
= 12 + 4 x 1 + 16 = 32g mol-1
= 0.032 kg mol-1
Molarity of the given solution
Applying the molarity equation,
(Given solution)
or