If 0.040 mol of Ca(OH)₂ are combined with 0.090 mol of HCl in the chemical equation below, what will be the limiting reactant? Ca(OH)₂(aq) + 2HCl(aq) --> CaCl₂(aq) + 2H₂O(l) Ca(OH)₂
HCl
CaCl₂
H₂O

The answer to your question would be c. mineral oil  

The ratio is 3: 2. i.e. c.

B) movement of materials into and out of the cell

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.