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What mass of NaOH and what volume of water are needed to make 400.g of 3.00% (by mass) solution?
Once, it is important that the level of the elution solvent not drop below the top of the adsorbent why? the absorbent is packed in a liquid chromatography column
If a certain gas occupies a volume of 14 L when the applied pressure is 7.0 atm , find the pressure when the gas occupies a volume of 3.5L.
Its atomic number was believed to be 126. What is the most probable distance of the innermost electrons from the nucleus of an atom of this element?
Which compound is the limiting reagent for this reaction. Calculate the change in enthalpy (delta H rxn) per mole of limiting reagent for this reaction.
The density of titanium metal is 4.51g/cm3 at 25C. what mass of titanium displaces 125.0ml of water at 25c.
To what volume should you dilute 150 mL of an 8.00 M CuCl_2 solution so that 55.0 mL of the diluted solution contains 5.9 g CuCl_2
A solid sample containing some Fe^2+ ion weighs 1.062 g. It requires 24.12 mL 0.01562 m KNno4 to titrate Fe^2+ in the dissolved sample to a pink end point
Make the compounds listed from an alkyl halide having four carbons or less, with no functional groups but it can be branched, or cyclohexane, cyclopentane, or ehylene oxide.
Each tablet contains 80. mg of the active ingredient and comes in bottles of one hundred. How many mL of a 0.100 M solution of HCl are required to dissolve ther active ingredient in a full bottle of Gaviscon tablets?
How much heat is required to vaporize 55.0 of acetone at its boiling point? The heat of vaporization of acetone at its boiling point is 29.1.
A gaseous mixture of O2 and N2 contains 39.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 645 mmHg
what is the pH of the buffer solution and what is the ratio of acid to conjugate base in order to decrease the pH by 1.00 unit from the value calculated of the buffer solution.
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