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A piece of Al(s) at 94°C is placed in 65g of H2O at 28°C. The Aluminum cools and after equilibrium the final temperature of Aluminum and water is 38°C. What was the mass of the aluminum?
What is the final temperature in a squeezed cold pack that contains 41.0 g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/g*C for the solution, an initial temperature of 26.5C.
Caffeine, C8H10N4O2, is a stimulant found in tea and coffee. A sample of the substance was dissolved in 41.5 g of chloroform, CHCl3, to give a 0.0940 m solution.
if molarity of a 2000ml solution is 4.0M NaCl, how many moles of NaCl are dissolved in that solution.
Even with a drying tube, leaving phenylmagnesium bromide exposed to air will eventually lead to its decomposition. Why? What is the product of this decomposition pathway?
What is the concentration of OH- in a solution that contains 0.225g of NaOH in 0.250L of solutio.
Calculate the quantity of heat energy in kilocalories evolved when 75 g of liquid water forms ice at 0 0C. (heat of solidification = 80 cal/g).
Determine how much heat is formed by this reaction if a typical packet has 250 g of Fe to warm your hands (or feet for up to 4 h) express your answer in kJ?
Determine the number of significant digits in each number and write out the specific significant digits.
what is the molarity of a solution made by dissolving 26.42g of (NH4)2SO4 in enough H2O to make 500 mL of solution?
In the Haber process for the production of ammonia, N2(g) + 3H2(g) ---> 2NH3(g) what is the relationship between the rate of production of ammonia and the rate of consumption of hydrogen?
Chlorine was previously identified as a catalyst in the breakdown of ozone into oxygen gas. Using the enthalpy of reaction for two reactions with ozone, determine the enthalpy of reaction for the reaction of chlorine with ozone.
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water,
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