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calculate the volume of hydrogen produced at 1.50 atm and 19 degress celsius by the reaction of 26.5 g of zince with excess hydrochloric acid according to the balanced equation
Zn(s) + 2HCL(aq)----> ZnCl(aq) + H2(g)
a gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. what is the total
The water temperature before the reaction was 34.5°C, and after the reaction it had risen to 52.0°C. How many moles of water were formed?
What weight of sulfuric acid will be needed to react completely 35.5g of ammonia in the production of ammonium sulfate.
What mass of water would be needed to evaporate from your skin in order to dissipate 1.7 X 105 J of heat from your body?
A fixed quantity of gas at 21 exhibits a pressure of 730 and occupies a volume of 4.40. Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.85 while the temperature is held constant.
In the purification of a mixture, what determines whether you use extraction or recrystallization as the initial procedure
In the production of printed circuit boards for the electronics industry, a 0.715 mm layer of copper is laminated onto an insulating plastic board. Next a circuit pattern made of a chemically resistant polymer is printed on the board.
2Fe(s) + O2(g) => 2FeO(s) ?H = -544.0 kJ 4Fe(s) + 3O2(g) => 2Fe2O3(s) ?H = -1648.4 kJ Fe3O4(s) => 3Fe(s) + 2O2(g) ?H = +1118.4 kJ Given the data above, determine the heat of reaction, ?H, for the reaction below: Reaction: Fe2O3(s) + FeO(s) => Fe3O..
The next day you notice that some of the gas has leaked out. The pressure and temperature remain the same, but the volume has changed to 12.0 . How many moles of gas () remain in the cylinder
Write the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. Write noreaction if no insoluble salt forms KCl(aq)+Pb(NO3)2(aq)
How would you make a buffer with a volume of 2.0 L, pH of 5.0 and a strength of 0.25 M using 5.0 M acetic acid stock solution (Ka = 1.8x10-5) and sodium acetate ( NaO2C2H3 available as a solid salt FW = 82 g/mole).
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.695-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. What mass of H2 is formed
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