25.0 cm3 of a solution of sodium hydroxide required 18.8 cm3 of 0.0500 mol/dm3 H2SO4

H2SO4+2NaOH—> Na2SO4+ 2H2O

1) find the concentration of the sodium hydroxide solution in mol/dm-3

2) find the concentration of sodium hydroxide solution in g/dm3

i think so

Ba(OH)2 + H2SO4 > BaSO4 + 2H2O

1) Moles of Ba(OH)2 = moles of H2SO4 = 0.025L x 2)0.02M = 5.0 x 10^-4M

Concn of Ba(OH)2 in g/L = 5.0 x 10^-4M x 171.33g/mol = 0.086g/mol

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

its first and third is your answer i did the qustion the fourth isnt right