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If 2.50 g of glucose (C6H12O6) are dissolved in 1.00 x 102 mL of solution, calculate the molarity of the glucose solution.
find the percent composition of a compound that contains 1.94g of C, 0.48-g of H and 2.58-g of S in a 5.00-g S sample of the compound
The pH of a bicarbonate-carbonic acid buffer is 6.95. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-)
Rank the following atoms (from smallest to largest) based on which would have the largest second ionization energy?
Calculate the amount of heat liberated (in kJ) from 351 g of mercury when it cools from 88.0°C to 15.0°C.
sodium metal reacts violently with water to produce aqueous sodium hydroxide and hydrogen gas. calculate the enthalpy change for this reaction.
How much energy is needed to heat 69.0 grams of H20(s) by 24.0 celcius if specific heat is 2.087 J(g celcius)
A student has sample of HNO3 of 340 ml at 25 degrees celsius and add water of 110 ml at 95 degrees celsius then determine the final temperature of the mixture
A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans.
A certain reaction has an activation energy of 70.0 Kj/mol and a frequency factor of A1 = 4.80×1012. A) What is the rate constant, k , of this reaction at 30.0 C
Aluminum has a specific heat of 0.880 J/g-deg. How many joules are needed to heat 155g of Al from 20.0oC to 75.0oC
A 5.95-g sample of AgNO3 is reacted with BaCl2 according to the equation to give 3.21 g of AgCl. What is the percent yield of AgCl? AgNO3(aq) + BaCl2(aq) --> AgCl(s) + Ba(NO3)2(aq)
You have a sample that consists of 8.2 (+ or -)o.1mL of aqueous 239Pu solution. You measure two 10mL aliquots by liquid scintillation counting and get 3211.4 cpm and 3315.2 cpm, respectively.
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