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To process certain metal ores, reactions with carbon can sometimes generate the pure metal at high temperatures. Consider the reaction of zinc oxide with carbon:
ZnO + C → Zn + CO ; ΔrH = 240 kJ/mol
How much heat needs to be absorbed by the system (in kJ) to react 3531 g of ZnO with 274 g of C until the reaction is completed?
Nitrogen monoxide, a gas recently found to be involved in a wide range of biological processes, reacts with oxygen to give brown NO2 gas. 2 NO(g) + O2(g) ? 2 NO2(g) ?rH° = -114.1 kJ/mol-rxn
a 50.00-ml sample of 0.100 m koh is titrated with 0.152 m hno3. calculate the ph of the solution after 52.00 ml of hno3
How many protons and electrons are needed to make an atom neutral? What about the number of neutrons? How many protons and electrons are needed to make an ion o
If solutions of potassium carbonate, copper(II) chloride, and lead(II) nitrate are each added to a beaker, what is the net ionic equation for the precipitation reaction that occurs
A pure titanium cube has an edge length of 2.65 .How many titanium atoms does it contain. Titanium has a density of 4.50g/cm^3
layered 20 mL of 2% sebacoyl chloride (decanedioyl chloride)/hexane on top of the aqueous solution. And then we used forceps to draw the solid that forms at the interface A(nylon) into a thread and wound the thread around a test tube. (It was whit..
How many molecules of carbon dioxide will be formed if 4.89 g of propane, C3H8, is burned with excess oxygen. Correct Answer : 2.00 × 1023 molecules
Why electroplating takes place on the cathode and electro refining takes place on the anode?
A hepatitisB immune globulin contains 315 international units per milliliter. If the dose is 0.04 mL/kg for a specific 135 pound patient calculate the amount of units needed (round to the nearest unit).
When sodium reacts with water, 255 mL of hydrogen gas forms along with sodium hydroxide. What mass of sodium is needed for this reaction?
calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids.
If you start out using 10.0 grams of HCO 3 and excess of acetic acid, how many moles of CO 2 can form? How many grams of CO 2 can form?
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