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Two 20.0-g ice cubes at -13.0 °C are placed into 225 g of water at 25.0 °C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.
How many milliliters of 0.20M NaOH do you need to neutralize 40.0 ml of 0.12M acetic acid?
What is the molarity of a solution made by dissolving 74.8 g of strontium perchlorate in sufficient water
Consider a lake containing 39 ppb (parts per billion) of parathion, which has a log Kow = 3.8. If a sample of lake water was mixed with octanol, what is the expected concentration of parathion in the octanol?
A physician wrote a prescription for Tylenol 325 mg/5mL with codeine 10 mg/5mL, 5mL three times a day for 4 days as needed for cough. How much Tylenol in milligrams is contained in a teaspoonful?
What mass of potassium can be produced by the reaction of 215 g Na with 296 g of KCl?
although aspirin solutions do not absorb visible light, we are still able to use visible light in an experiment to analyze the purity of aspirin. Why?
The reaction 2NOCl(g) → 2NO(g) + Cl2 (g) has an activation energy of 100.0 kJ/mol and a rate constant at 400.0 K of 8.5 x 10-6 mol-1 L s-1. Determine the rate constant at 450 K.
the fact that the relative reactivity of C-H bonds of an alkane for free-radical chain halogenation is tertiary > secondary > primary?
when 56.6 g of calcium and 30.5 g of nitrogen gas undergo a reaction that has a 93.0% yield, what mass (g) of calcium nitride forms.
if you started a ride with ice packs that held 1600g of frozen water at 0 degree celius, and the temperature of the water at the end of the ride is 32 degree celius, How many calories of heat energy were absorb
A solution is prepared by adding 0.500 g of solid NaCl to 50.0 mL of 0.100 M {CaCl_2}. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
Calculate the change in internal energy of the gas in each case of these processes.
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