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Explain how many moles are in 50 ml of a sodium hydroxide solution which was made from 1.2g sodium hydroxide of about 0.1 mol*L-1and 300ml H2O?
A researcher determines that 744 J of energy needed to vaporize a 355-mg sample of a liquid at its boiling point. Determine the heat of vaporization and heat of condensation of the substance
a how many grams of na2so4 are there in 15 ml of 0.50 m na2so4? b how many milliliters of 0.50 m na2so4 solution are
The soda ash in your analysis was assumed to be pure Na2CO3. If some of the Na2Co3 is replaced by an equal number of formula weights of NaHCO3, how would the volume of acid change from
Choose the selection which lists the following substances in order of increasing boiling point (lowest boiling substance listed first)
A mixture of sodium bromide and sodium iodide weighs 1.620 g. when treated with excess silver nitrate it yields a mixture of silver bromide and silver iodide which weighs 2.822 g. how many grams of sodium iodide was in the original mixture
Gaseous oxygen is held in 2 separate containers at identical temperature and pressure. The volume of container A is 7.92 L and it contains 0.209 mol of the gas. The volume of container B is 2.45 L. How many moles of the gas are in container B
Calculate the amount of heat needed to boil benzene (C6H6), beginning from a temperature of 6.7 degrees celcius.
A voltaic cell is constructed with two Zn+2-Zn electrodes. The two cell compartments have [Zn+2]=5.00 M and [Zn+2]=1.00 x 10^-2 M, respectively. What is the standard emf of the cell?
The reaction is spontaneous at all temperatures C) It is impossible to determine if the reaction is spontaneous without calculations D) The reaction will only be spontaneous at low temperatures E) The reaction will only be spontaneous at high temp..
Define pH. why do chemists normally choose to discuss the acidity of a solution in terms of pH rather than hydrogen ion concentration [H+]
This first-order reaction is 25% complete after 26 s. How much longer would one have to wait in order to obtain 99% conversion of benzoyl chloride to benzoic acid?
hydrogen and oxygen react under a specific set of conditions to produce water according to the following equation.2 h2g
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