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How many chloride ions are present in 0.53g of cacl2?
consider the combustion of ethane2c2h6 7o2 yields 4co2 6h2oif the ethane is burning at the rate of 0.1 molls at what
A pstient is administered mercury-197 to help evaluate kidney fuction. Mercury-197 has a half - life of 65 hours. what fraction of an initial of an initial does of mercury-197 remains after 6-0 days?
calculate the amount of energy in kilojoules needed to change 135 of water ice at -10 degrees celsius to steam at 125
What is the change in enthalpy for the neutralization. Write the net ionic equation for this neutralization reaction, including the states of matter (i.e. (aq)) for the reactants and products.
certain substance has a temperature of 30 oC, a mass of 10.2 g and a density of 1.02 g/cm3. What will the % concentration, temperature, mass and density of 20.0 mL of this solution be?
A 29.20 g piece of iron and a 25.30 g piece of gold at 100.0 degree C were dropped into 980.0 mL of water at 15.65 degree C. The molar heat capcities of iron and gold are 25.19 J/(mol degree C) and 25.41 J/(mol degree C), respectively.
If 23 g of carbon dioxide and 50g of graphite are placed in a 2 L reaction vessel and heated to 850°C. What is the mass of CO at equilibirium
The compound adrenaline contains 56.79% C, 6,56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for adrenaline?
Write an empirical formula for each of the following. (using the format CO2 for CO2.) (a) Ethylene glycol, car antifreeze, molecular formula C2H6O2
phosphoric acid is a commonly used biological buffer because the pka for dissociation of its second proton is near
A sample of argon gas occupies a certain volume at 14 degrees C. At what temperature would the volume of the gas be three times as big? Assume the pressure stays constant.
What conditions are used in the Haber process to enhance the yield of ammonia. Explain why each condition affects the yield in terms of the Le Chatelier principle
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