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A chemist measures the energy change ΔH during the following reaction: 2HgO(s)→2Hg(l)+O2(g) ΔH=182.kJ
Suppse 72.6 g HgO react.
How much heat will be released or absorbed. Use the correct number of sig. digits.
A line in the ultraviolet region of the hydrogen spectrum has a wavelength of 102.5 nm. What is the transition responsible for this wavelength
One tablespoon of peanut butter has a mass of 15g. It is combusted in a calorimeter whose heat capacity is 130 kJ/degrees C. The temperature of the calorimeter rises from 22.4 degrees C to 25.2 degrees C.
1.which of the following is an l-aldotetrose?2. which of the following is a d-aldotetrose?3. which structure is
If a chemist wishes to prepare a buffer that will be effective at a pH of 5.0 and 25C, which of the following would be the best choice for the acid component and WHY
Calculate the total heat in joules needed to convert 25.00 g of ice at -3.50 degrees c to liquid water at 0.250 degrees c.
Why must the structures of the reactants and products be known in order to estimate the enthalpy change of a reaction from bond energies.
To determine the concentration of a 25.0 ml acetic acid solution (Ka for acetic acid is 1.8 X 10^-5), 25.0 ml of 2.00 M NaOH solution is used to reach the endpoint of titration. Calculate the pH of the endpoint.
Manufacturing overhead equal $5, $2, and $3respectively. Calculate the amount of material cost, labor cost, andoverhead cost in the beginning Work in Process.
consider the reactioncacn2 3 h2o caco3 2 nh3 .how much caco3 is produced if 47.5 moles nh3 are produced?1. 0.950 g2.
What volume of 2.811 M oxalic acid solution is needed to react to the equivalence point with a 5.090 g sample of material that is 92.10% NaOH
A solid that weighs 0.008kg . Put the solid into a gradulated cyliner filled with water and the volume increases by 10cm 3 what is the denity?
If the stick's tangential linear velocity is 14 m/s at impact, what is the instantaneous angular velocity of the stick at contact?
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