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A sample of iron is taken from a beaker of boiling water and placed into a 125.00 g sample of water at 19.4 celsius and the temperature of the water raises to 25.6 celsius. Calculate the mass of the iron sample if this required 13,200 Joules.
a sample of neon to escape from a hole in a container, how long would it take for an equal amount of nitrogen gas, N2, to escape
What is the molar mass of adrenaline in a solution of 0.64 g of adrenaline in 36.0 g of CCl4 elevates the boiling point by 0.49?
Sodium metal reacts with water to produce hydrogen gas and sodium hydroxide according to the chemical equation shown below. When 0.030 mol of Na is added to 100.00 g of water, the temperature of the resulting solution rises from 25.00°C to 37.90°C
If 5.20mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of 0.1000 M HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram?
We all face potential hazards in our workplaces and in our homes. Ideally we can eliminate or control many of these; however, if and when they occur, a Risk Assessment Plan is our best defense.
For each of the subsequent substances, calculate the final temperature when heat in the amount of 60kJ/mol is added to the sub cooled liquid at 25 deg. C at atmospheric pressure.
You are given 2.51 g of salicylic acid (MM = 138.118 g/mol). Utilizing the procedure in the lab manual for the synthesis of aspirin (MM = 180.154 g/mol), you recover 1.34 of aspirin. Compute your percent yield of aspirin.
What is the freezing point of a 50% by weight solution of ethylene glycol, C2H6O2, in water? Molecular weight of ethylene glycol is 62.0 g/mol
Explain how the following factors affect fluorescence quantum efficiency- increasing structural rigidity, decreasing temperature, rising sample concentration.
At 500 K, PCl5 decomposes rather extensively into PCl3 and Cl2. If 1.000 moles of PCl5 is placed in a 1 liter box at 500 K, 13.9 % of it decomposes into PCl3 and Cl2
Low molecular weight esters have fruity flavors and odors. Explain why do carboxylic acids, which have lower molecular weights than esters of that carboxylic acid have higher boiling points lower vapor pressure and volatility than the correspond..
In a first order decomposition in which the rate constant is 0.03 sec-1, how much of the compound (in mol/L) is left after 26 sec, if there was 2.00 mol/L at the start
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