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a)what temperature change would you expect in which 50.0 mL of 2.0M HCl is combined with 80.0 mL of 2.0 M NaoH in calorimeter with a heat capacity of 10J/gC? Show your work.
b) Citric acid, can be obtained from lemon juice contains C, H, and O. It is 37.5% Carbon and 4.17% hydrogen by mass. Citric acid has three acidic hydrogens per molecule. A 0.250g sample of citric acid dissolved in 25.0 mL of water requires 37.20 mL of 0.105 M NaOH for complete neutralization. What is the molecular formula of citric acid?
A quantity of Oxygen (g is originally at 4.75 atm and 26 degree Celsius in a 5.00 Litre container is transferred into the same container determine the total pressure in the new container?
Calculate the theoretical yield of aspirin to be obtained, starting with 2.0 g of salicylic acid. 2. If 1.8 g of aspirin were obtained in this experiment, what would be the percent yield?
A boy receives 10mg of medicine for every kg he weighs. How much medicine should he receive if he weighs 48 pounds and the conversion factor for pounds to kilograms is 1 pound = 0.4536kg.
A volume of 95.0ml of h2o is initially at room temperature 22.0 C. A chilled steel rod at 2.00 *C.is placed in the water. If the final temperature of the system is 21.2 *C. what is the mass of the steel bar?
What is the final concentration of Na+ if 250 ml of 0.3 M Na Cl is added to 750 ml of 0.125 M Na2SO4?
If oxygen gas were collected over water at 295K and the total pressure of the wet gas were 710 mm Hg, what would be the partial pressure of the oxygen
What is the boiing point for each compound?
How many moles of a monoprotic acid with a Ka=4.9x10^-6 must be dissolved in 750 ml of H2O to produce a solution with pH=4.50
What is the pressure in a 17.1 L cylinder filled with 47.9 g of oxygen gas at a temperature of 341 K?
Batting averages of baseball players are reported in parts per thousand. what would be the batting average of a hitter
In a reaction 82.00 g of sodium reacts with 74.00g of ferric oxide to form sodium oxide and iron metal. calculate the mass of solid iron produced
if the Hindenburg held 2.0x10^5 m^3 of hydrogen gas at 23 degrees Celcius and 1.0 atm, what mass of hydrogen in grams was present?
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