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A solution is created by dissolving 13.0 grams of ammonium chloride in enough water to make 265 mL of solution. How many moles of ammonium chloride are present in the resulting solution? When thinking about the amount of solute present in a solution, chem...

A chemist performs an acid–base titration using 0.176 M aqueous NaOH as the titrant with 26.15 mL of 0.102 M H2SO4. The endpoint of the titration is detected using phenolphthalein as the indicator. The balanced equation for the reaction is shown below: $$...

The hydroperoxide ion, HO2– (aq), reacts with permanganate ion, MnO4– (aq) to produce MnO2 (s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2(g) by permanganate ion in a basic solution.

Calculate how many grams of sodium azide (NaN3) are needed to inflate a 25.0 × 25.0 × 20.0 cm bag to a pressure of 1.25 atm at a temperature of 20.0°C. How much sodium azide is needed if the air bag must produce the same pressure at 10.0°C? 20.0°C: ______...

A chemist performs an acid–base titration using 0.176 M aqueous NaOH as the titrant with 26.15 mL of 0.102 M H2SO4. The endpoint of the titration is detected using phenolphthalein as the indicator. Some acid–base indicators are listed along with their pKa...

From the following data, calculate ΔH° for the reaction O3(g) +NO(g)----->O2(g)+NO2 (g) Compound ΔH°f (kJ/mol) O3 142.7 NO 90.3 O2 0 NO2 33.2

June 21

Stars generate light and other energy by fusion of hydrogen and other matter in the core. Hydrogen fuses to form helium. But you would notice that the mass of the helium nucleus (product) is less than the mass of four protons (hydrogen nuclei). It is the...

1.707g/cm3

divisible by 9

The hydroperoxide ion, HO2– (aq), reacts with permanganate ion, MnO4– (aq) to produce MnO2 (s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2(g) by permanganate ion in a basic solution.