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A person's heartbeat is 82 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? how do I solve this?
A 8.0 L sample at 25 °C and 1.00 atm of pressure contains 0.5 moles of a gas. If an additional 0.75 moles of gas at the same pressure and temperature are added, what is the final total volume of the gas?
The reaction between potassium chlorate and red phosphorus is highly exothermic and takes place when you strike a match on a matchbox. If you were to react 52.9 g of potassium chlorate (KCl03) with red phosphorus,
Aluminum has a density of 2.70 g per cm3. If a sheet of aluminum foil measuring 20.5 cm in length and 15.2 cm in width has a mass of 1.693 g, what is the thickness of the foil in mm?
What is diagonal relationship and explain diagonal relationship between Li and M g, Be and Al?
calculate the final pressure of a sample of carbon dioxide gamma1.40 that udergoes a reversible and adiabatic expansion
How many grams of sucrose (C12H22O11) must be added to 509 g of water to give a solution with a vapor pressure 0.723 mmHg less than that of pure water at 20 degrees C.
A 15ml aliquot of this solution was the diluted to 500ml of water. Calculate the final molarity
The current population of earth is about 6.5 billion people .Each person on average exhales about 1 kg of CO2 per day. How does this compare with current fossil fuel emission? This amount is not included in inventories of CO2 emissions. Why?
A 25.00 ml aliquot of a nitric acid solution of unknown concentration is pipette into a 125ml Erlenmeyer flask and 2 drops of phenolphthalein are added.
As a technician in a large pharmaceutical research firm, you need to produce 450.ml of 1.00M potassium phosphate buffer solution of pH = 7.13. The Pka of H2PO4 - is 7.21.
At room temperature, the equilibrium constant, Keq is approximately 3. Calculate the number of moles of reactants and products expected in the equilibrium mixture of this reaction
What are your weight in new tons and your mass in kilograms. (In Europe, you would "weigh" yourself in kilograms or "kilos.") Astronauts walking on the Moon are seen "bounding" rather than walking normally. Why is this?
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