The Erlenmeyer flask that was used in the titration below contained 25.0 mL of 0.1 M HCl. If 0.1 M NaOH solution was used in this titration, which statement correctly explains point B on the curve?
This is the equivalence point of the curve.
0.003 mol of OH– ions are present in the flask at this point.
0.0005 is the number of excess moles of OH– ions at this point.
0.0005 is the number of moles of H+ ions present at this point.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?

Rays from the sun are not considered matter true or false