In water , the proportion of oxygen and hydrogen by mass is : (a) 1 : 4 (b) 1 : 8 (c) 4 : 1 (d) 8 : 1
In water, the proportion of oxygen and hydrogen by mass is :
In hydrogen peroxide (H2O2), the proportion of hydrogen by mass is :
In water, the mass ratio of hydrogen to oxygen is always 1:8.
What is the mass ratio of nitrogen to hydrogen in a NH3 molecule?