I remember coming across this question and the options were:
KOH, HCN, NH₃, HI, Sr(OH)₂
Now, a substance with a low pH is one that dissociates completely in water to release hydrogen ions, while basic substances dissociate completely to release hydroxide ions. Therefore, in the order of increasing pH:
HI, HCN, NH₃, Sr(OH)₂, KOH
The answer is Mixture. Two more substances put together but each retaining their own identity is a Mixture. They are t<span>wo or more substances dispersed in one another but each retaining their own identity.</span>
Answer and work pictured below:
2<span> NH3 the ratio between N2 and H2 is </span>1<span> : 3 ... actual moles H2 = 5000 g / </span>2<span> g/mol=2500 so H2 is the limiting reactant</span>