In the titration the student used 25.0 cm3 of sodium hydroxide. This volume reacted with exactly 20.0 cm3 of 0.1 mol/dm3 sulfuric acid solution.

The equation for the reaction is:

2NaOH + H2SO4 → Na2SO4 + 2H2O
What is the concentration in mol/dm3 of the sodium hydroxide solution?

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.

Which statement justifies that hydrogen peroxide (h2o2) is a polar molecule? the o – h bond is nonpolar and the molecule is asymmetric. the o – h bond is nonpolar and the molecule is symmetric. the o – h bond is polar and the molecule is asymmetric. the o – h bond is polar and the molecule is symmetric.

The lewis diagrams for magnesium and fluorine are shown below. what is the correct chemical formula for magnesium fluoride? a. mgf b. mg2f c. mgf2 d. mg2f3