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A system absorbs 295 kJ of heat and the surroundings do 177 kJ of work on the system. What is the change in internal energy of the system?
What volume (in mL) of a 1.420M NaOH solution is required to titrate 25.0mL of 4.50M HCl solution.
an automobile gasoline tank holds 21 kg of gasoline. When gasoline burs, 81 kg of oxygen is consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
Determine the volume of .450M NaPO4 is needed to precipitate all the lead(II) ions from 190.0mL of .550M Lead(II) nitrate?
How much energy in kilojoules is required to convert 260 mL of water at its boiling point from liquid to vapor.
N2 is .070 moles, O2 is 0.35 moles and CO2 is 0.20 moles, the total is pressure 1.55 atm what is the pressure of N2?
What is the concentration of unknown acid solution? Write the neutralization reaction, balance it, name the products THEN Solve the problem above.
An injection containing 10.0pg 10 5 B was injected into a patient suffering from a brain tumor. The patient was irradiated by a neutron gun at the site of the tumor.
A foundry worker throws a hot, freshly cast piece of iron into 10 liters (10 kg) of water to cool off. The initial temperature of the water is 25 degree celcius and the initial temperature of the iron is 100 degree celsius.
A 17.0-g sample of ice at -19.0°C is mixed with 101.0 g of water at 87.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
The vapor pressure of water is 28.3 torr at 29°C then determine what is the partial pressure of oxygen collected if a reaction at that temperature produces Carbon Dioxide which is collected over water at a total pressure of 576 torr, ?
How many liters of water vapor can be produced if 13.3 liters of methane gas (CH4) are combusted, if all measurements are taken at the same temperature and pressure?
Please review the occurrence and cycling of calcium in nature, along with its use. Analyze and evaluate the article as to it's contemporary relevance regarding the elements availability, health implications and environmental impact.
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