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Calculate the minimum number of grams of that must be combusted to provide the energy necessary to convert 2.50kg of from its solid form at -14.0 C to its liquid form at 60.0 C .
Using the "like dissolves like" rule and the chemical structure of your unknown liquid, explain its solubility/insolubility in water. Describe the type of bonding that your unknown has (covalent, polar covalent)
a certain amount of NH4OCONH2 is placed in an evacuated rigid container and allowed to come to equilibrium. Calculate the total pressure in the container at equilibrium.
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius)
If 69.5 kJ of heat is applied to a 1038 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
Endorphins: What Are They and How Do They Work?, Describe in brief the chemistry and biology of the feel-good chemical, endorphins. Also explain why the name feel good
If ΔH = -60.0kJ and ΔS = -0.200kJ/K , the reaction is spontaneous below a certain temperature. Calculate that temperature. Express your answer numerically in kelvins.
Discuss how to find the molar mass of a compound, percent composition of the elements of a compound and how to determine the empirical and molecular formulas from percent composition.
In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 23.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142-km trip in Europe?
BNCT relies on the initial targeting of tumor cells by an appropriate chemical compound tagged with 10 5 B , which preferentially concentrates in tumor cells.
Portable heater transfers 255 W to 5.5 L water, where 1 W = 1J/s. How many minutes will it take for the heater to heat 5.5 L water from 25 degrees C to 42 degrees C? Assume water has density of 1.0 g/mL
What is the pH at the point during a titration when 22 mL of 0.200 M HCl has been added to 33 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3. Answer in units of pH
Gas tank holds 42kg of gasoline. When gasoline burns, 147kg og oxygen are consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
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