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Define a sample of gases contains a mixture of 10 moles of He and 20 moles of Ne. The total pressure is 18 atm. Explain what is the partial pressure of He?
a 45 kg person drinks 390. g of milk which has a caloric value of approximately 3.0 kjg. if only 18 of the energy in
An unknown compound contains only carbon, hydrogen, and oxygen. Combustion of 4.00 g of this compound produced 5.87 g of carbon dioxide and 2.40 g of water.
write the decay reaction for each of the following processesa a decay of 232u and 234pu 92 94b szlig- decay of 45ca and
what sequence of steps represents the best synthesis of 2-heptanol? a ch3ch2ch2mgbr 2 moles formaldehyde in diethyl
cobalt-60 has a halflife of 5.26 yr. the cobalt-60 in a radio therapy unit must be replaced when its radioactivity
What is the % yield of the reaction. Also what will happen if you place two electrodes in a solution of your product and connect the electrodes to the battery. What will occur
How many liters of the antifreeze ethylene glycol [CH2(OH)CH2(OH)] would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -20°C?
Calcite (CaCO3) has two types of bond. (covalent and ionic) a) Demonstrate which is the stronger by calculating the degree of ionic character of each bond
When sodium carbonate dissolves in water, the carbonate ion CO3^2- acts as a base. write a balanced equation for the reaction of the carbonate ion with water.
A 2.89-L flask is filled with propane gas (C3H8), at 1.00 atm and -23.0°C. What is the mass of the propane in the flask?
Explain the order of elution you observed while performing the gas chromatography for this experiment. What property of the product molecules seems to be the most impor- tant in determining relative retention times?
Each of 2 front tire in the car is filled with a different gas. One tire contains 116g of helium, another tire has 160g of unknown gas. How many times heavier is a molecule of the unkown gas than an atom of helium.
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