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Considering Lewis structures, which of these compounds possesses a single unpaired electron?
A) N2 B) N2O C) NO D) N2O4 E) O2
The reaction can be represented as {\rm 2 NI_3 (s)\rightarrow N_2 (g) + 3 I_2 (g)},~{{\Delta H}}_{\rm rxn} = -290.0~{\rm kJ} Find the change in enthaply when 16.0g of \rm NI_3 decomposes.
What are some ways to induce recrystallization (Name 3), if your solute refuses to recrystallize after performing the required 7 steps?
In what type of material is the energy gap between the valence and the conduction band the greatest? Na, Ge or diamond. Draw a rough energy band showing the valence
An automobile gasoline tank holds 47kg of gasoline. When the gasoline burns, 165kg of oxygen are consumed and carbon dioxide and water are produced.What is the total combined mass of carbon dioxide and water that is produced?
A buret containing NaOH solution has an initial reading of 0.14ml. 25.00ml of 0.1000M HCl is titrated to a phenolphthalein end point,
Chemicals available for extractions: CH2CL2, 1M NaOH, 1M HCL and sodium sulfate for drying, Chemicals available for crystallization: ethyl ether, 95% ethanol, methanol, isopropyl alcohol, acetone, hexane, toluene and methylene chloride.
Determine how much dolomitic lime(is an anhydrous carbonate mineral composed of calcium magnesium carbonate CaMg(CO 3 ) 2 ) is required to apply to raise the pH to 7.0?
Write balanced net ionic equation for the reactions that take place when the following reagents are mixed together in aqueous solution:
At 0.0oC, if the volume of air is 1.5 mL and the pressure of the atmosphere that day is 735 mmHg, what is the number of moles of air?
A balloon has a volume of 1.20 at 24.0 degrees Celsius. the balloon is heated to 48.0 degrees Celsius. calculate the new volume of the balloon.
one mole of B at 2 bar are separated by a partition and surrounded by a heat reservoir. when the partition is withdrawn, how much does the entropy change?
A 0.456 gram sample of an unknown monoprotic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
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