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If a system has 4.00 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system?
If, under certain conditions, 1.4 g of X reacts with 2.1 g of Z to produce 3.5 g of X2Z3, then, under different conditions, if 0.80 g of X reacts with 1.6 g of Z to produce 2.4 g of a new compound, what is the formula for this new compound?
A soft drink contains 44 mg of sodium in 325 g of {rm H_2O}. What is the concentration of sodium in the soft drink in mass percent?
It takes 49.0 to raise the temperature of an 8.00 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal?
A gaseous mixture made from 6.00 g O2 and 9.00 g CH4 is placed in a 15.0-L vessel at 0 °C. What is the partial pressure of each gas, and what is the total pressure in the vessel
Consider the brilliant blue spectrum (blue 1) shown here. What is the wavelength of maxmal absorbance in nm? (Do not include units in your answer: number only)
Identify the spectator ions that will form when aqueous solutions of sodium carbonate and silver nitrate are mixed. Answer a. Na+, NO3-, and Ag+ b. Na+ and CO32- c. Ag+ and NO3- d. Na+ and NO3- e. Ag+ and CO32-
Presume that 0.89g of water condenses on a 80.0g block of iron that is initially at 22C. If the heat released during condensation goes only to warming the iron block, explain what is the final temperature (in C) of the iron block. Presume a consta..
Problem- 61.4g unknown metal, with a molar mass 97.5 g/mol, has an initial temperature of 26.5oC. What is the final temperature when 1.10kJ of heat added to the metal
Draw all possible monochlorination products of 3,3-dimethylpentane, including stereoisomers.
Nitrogen dioxide and water react to produce nitric acid HNO3, and nitrogen oxide: 3NO2(g) + H2O(l) -------- 2HNO3(aq) + NO(g)
Intermolecular interactions can be classed as either: strong, moderate, or weak. Give two examples for each class and give approximate values for the magnitude
The electron in a hydrogen atom occupies a 6p orbital. What is the longest wavelength of light that can be emitted by this atom? Give answer in nanometres, nm
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