A .165 g sample of holonium (Ho, atomic mass = 165) was dissolved in excess hydr
ID: 731085 • Letter: A
Question
A .165 g sample of holonium (Ho, atomic mass = 165) was dissolved in excess hydrochloric acid. The hydrogen gas liberated was trapped in a cylinder over water and at atmospheric pressure. The volume of gas was 36.9 mL over water at 18 degrees C with a barometric pressure of 742.3 mmHg. What is the formula of the holmium chloride formed.Write a balanced equation for the reaction of Ho metal with HCl.
Percent difference between the values for the ratio moles H2/moles Ho obtained from above and the eheoretical value obtained from the balanced equation?
Explanation / Answer
you have to subtract the vapor pressure since it's not dry air. i think it's 25.2mmHg, so subtract that from the pressure, then convert to atm's
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