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Question - 1-Calculate the pH of a solution in which [H+] = 1.25 x 10-12 M. [1] Report your answer to 3 SF only!
2-Using the average atomic mass of lithium, calculate the mass, in amu, for a sample of 2.78 x 1025atoms of Li. [1] amu. Enter your answer using scientific notation.
3- Given the following balanced equation: 2 H2+ O2? 2H2O a) how many moles of water would form if 14.0 g of H2 reacted? moles b) how many grams of water would form if 14.0 g of O2 reacted? grams Comment
4-In a balanced chemical equation, the [1] indicate the molar relationships between any two reactants, any two products, or between any reactant and product
Thank you! My final is tomorrow and I am in desperate need!
The activation energy for the reaction is 48.1kj/mol. What is the half-life (in hr) in the winter (10.0 C)?
How many grams of aluminum hydroxide are obtained from 18.2g of aluminum sulfide?
what is the lewis dot structure of
Classify the following as Arrhenius, Bronsted-Lowry, or Lewis acid-base reactions. A reaction may fit all, two, one, or none of the categories. Cu^2+ + 4Cl- --> CuCl2^2-
Determine the pH of a solution of a .150 M NaF solution. (ka for HF=3..5*10^-4) 3)Determine the pH of .050 M H2CO solution and the % dissociation of each step
A 2.0 kettle contains 116 grams of boiler scale (CaCO3). How many times would the kettle have to completely be filled with distilled water to remove all deposits at 25 degree celsius?
The procedure (paragraphs 2 and 3) states that the additions of bromobenzene, methyl benzoate and hydrochloric acid must be done slowly.
Your job is to use the stock solution to prepare 4 solutions with concentrations of 10 ppm, 5 ppm 2.5 ppm and 1.0 ppm. Describe how you would make these four solutions and show all calculations.
how does structure help predict and affect the Rf of each compound based on intermolecular forces
A buffer is prepared by adding 21.0g of sodium acetate ({\rm CH_3 COONa}) to 520mL of a 0.140M acetic acid ({\rm CH_3 COOH}) solution.
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals
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