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A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 110g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7C What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
Enter your answer in kilojoules per mole of compound to three significant figures
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 13.0 oz drink from 74 degree F to 31 degree F
If 2.45 g of N2H4 reacts and produces 0.650 L of N2, at 295 K and 1.00 atm, what is the percent yield of the reaction?
An experiment requires 44.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
Write the equation for this reaction, labeling the acid, base, conjugate acid, and conjugate base
Atmospheric pressure decreases as altitude increases. In other words, there is more air pushing down on you at sea level, and there is less air pressure pushing down on you when you are on a mountain
A particular gaseous hydrocarbon that is 82.7% C and 17.3% H bymass has a density of 2.33g/L at 23oC and 746 mmHg. What is the molecular formula of this hydrocarbon?
The freezing point depression constant, Kf, for water is 1.86?C/m. Suppose that 5.00 g of mercury(I) nitrate was dissolved in 100.0 g of water
calculate the number of moles of gas generated when 0.165grams of aluminum reacts with hydrochloric acid
Compound A has a parent peak of M+ = 95 m/z in its mass spectrum and shows a medium intensity sharp infrared absorption band at 2280 cm. The HNMR of compound A shows 3 signals in a 4:4:1 ratio.
Consider the following reaction: 2 HI(g) -> H2(g) + I2(g) If 3.55 moles of HI(g), 0.550 moles of H2, and 0.630 moles of I2 are at equilibrium in a 1.00 L container at 915 K
how would you prepare 100ml of 0.5M NaOH? Calculate the mass of NaOH needed, and describe the procedure and glassware you would use.
concentrated sulfuric acid used in the labortory is 95% by mass. calculate the mass of water in 100-g
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