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A sample of 4.00 g of a substance with a molar mass of 80.0 g/mol is combusted and the heat released is used to heat 750.0 mL of water from 15.0 degrees Celsius to 22.0 degrees Celsius. Calculate the (delta)H in kJ/mol.
One mole of carbon-12 atoms is equal to a mass of exactly how many grams of carbon-12 atoms?
An object is coated with a layer of chromium that is 0.015 cm thick. If the object has a surface area of 15.3 cm squared, how many atoms of chromium are used in the coating. The density of chromium is 7.19 g/cm cubed.
water boils at 373 k.the molar enthalpy of vaporation for water is 407 kjmo1.if one mole of water is at 373 k when it
A feed mixture weighing 200 kg of unknown composition containing water, acetic acid, and isopropyl ether is contacted in a single stage with 280 kg of a mixture
in one city a balloon with a volume of 6.0 l is filled with air at 101 kpa pressure. the balloon in then taken to a
Suppose the calorimeter for this experiment had been made of a heat-conducting material (such as metal) rather than plastic foam, so that the portion of heat energy lost to the calorimeter itself was larger and could not be ignored
The rate constant for a certain reaction is = 4.60×10-3 s^-1. If the initial reactant concentration was 0.900 M , what will the concentration be after 5.00 minutes
To what volume should you dilute 45mL of a 12M stock HNO3 solution to obtain a 0.121M HNO3 solution
Why does the non aqueous reaction of pyridine and SnCl4 produce a white precipitate
Decribe the preparation of the 100mL of a 50 mM acetate buffer at pH 5.5 beginning iwth sodium acetate and 1M acetic acid
What is the equilibrium concentration of Cu+ (aq) in a solution that is 0.0200M solution in CuNO3 and 0.450M HCl (aq)
A wastewater disposal well for carrying various wastes at different times is drilled into a formation of limestone (CaCO3), and the wastewater has time to come to complete equilibrium with the calcium carbonate before leaving the formation through..
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