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Combustion reactions are a notable source of carbon dioxide in the environment. Using the following
balanced equation, how many grams of carbon dioxide are formed when 100.00 g of propane (C3H8) is
burned? Express your answer to the correct number of significant figures. Be sure to show all steps
completed to arrive at the answer.
A manufacturing company is trying to produce a lightweight but strong cart for use by home gardeners.
Explain which metal—titanium (Ti), iron (Fe), or zinc (Zn)—would be the best for this application and
why?
A gas exerts a pressure of 2.0 atm, at 30°C, in a 10 L container. In what size container would the same amount of gas exert a pressure of 4.0 atm at 20° C?
Calculate the standard entropy of melting of ice ,if it's melting 0oc and given the standard enthalpy of melting point 600j/mol
how are the metals held in biological environment
what is enzemys
Write the heat of formation reaction equations for:
a) C2H5OC2H5(l) b) Na2CO3(s)
Homes may be heated by pumping hot water through radiators. What mass of water will provide the same amount of heat when cooled from 95.0 to 35.0 °C, as the heat provided when 100 g of steam is cooled from 110 °C to 100 °C.
When 1.34 g Zn(s) reacts with 60.0 mL of 0.750 M HCl(aq), 3.14 kJ of heat are produced. Determine the enthalpy change per mole of zinc reacting for the reaction:
Zn(s) +2HCl (aq) → ZnCl2 (aq) +H2 (g)
A coffee-cup calorimeter contains 60.0 mL of distilled water at 22.7 °C. Solid ammonium bromide (3.00 g) is added and the solution is stirred, giving a final temperature of 18.3°C. Using the same assumptions find ΔHsoln for NH4Br (in kilojoules per mole).
