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1. The combustion of ammonia in the presence of excess oxygenyields NO2(g) and H2O(g):4NH3(g) + 7O2(g) → 4NO2(g) + 6H2O(g)The combustion of 43.9 mg of ammonia produces how many grams ofNO2(g)?A. 178B. 0.119C. 43.9D. 0.954E. 2.582. Calcium carbide, CaC2(s), reacts with water to produceacetylene, C2H2(g): CaC2(s) + 2H2O(g) → Ca(OH)2(s) + C2H2(g)Production of 13 g of C2H2(g) requires consumption of how manygrams of H2O(g)?A. 18B. 0.048C. 9.0D. 480E. 4.53. How many moles of oxygen, O2, are needed for the completecombustion of 5.00 g of octane (C8H18)?A. 0.111 moleB. 1.10 moleC. 0.547 moleD. 0.333 moleE. 2.20 mole4. When aqueous solutions of Fe2(SO4)3(aq) and Pb(NO3)2(aq) aremixed, an insoluble salt forms. Which of the following representsthe correct net ionic equation that describes this reaction?A. Fe3+(aq) + 3NO3-(aq) → Fe(NO3)3(s)B. Fe3+(aq) + SO42-(aq) + Pb2+(aq) + 3NO3-(aq) → Fe(NO3)3(s) +PbSO4(s)C. 2Fe3+(aq) + 3SO42-(aq) + 3Pb2+(aq) + 6NO3-(aq) →2Fe(NO3)3(s) + 3Pb2+(aq) + 3SO42-(aq)D. Pb2+(aq) + 2NO3-(aq) → Pb(NO3)2(s)E. Pb2+(aq) + SO42-(aq) → PbSO4(s)5. The fermentation of glucose, C6H12O6, produces ethyl alcohol,C2H5OH, and carbon dioxide. How many grams of glucose are needed toform 7.50 g of ethanol?A. 44.0 gB. 58.7 gC. 29.3 gD. 11.2 gE. 14.7 g
a spoon was silver plated electrolytically in a silver nitrate solution. if 0.750 grams of silver was deposited on the
some liquids have high enthalpies of vaporization while others have relatively low values. explain this fact in terms
a ball is thrown verticall downward with an initial speed 11.3 m from a roof of a building 39.0m above the ground .how long doest it take to reach the ground? what is its speed of impact?
Determine at what temperature will a sample of air containing 5.0x10^14 Peroxyacetyl nitrate molecules per liter decomposes at the rate of 1.0x10^12 Peroxyacetyl nitrate molecules per liter per minute.
The heat of combustion for ethane C2H6 (molar mass=28.0g/mol) is 52.0 kj/g. How much heat would be released if 14g of ethane undergo combustion. How much heat would be released if 2.75 moles of ethane undergoes combustion
If a 100.00 g sucrose solution has a boiling point of 101.5 Celsius degrees, how many moles of sucrose are in the solution. How many grams.
In a treatment that decreases pain and reduces inflammation of the lining of the knee joint, a sample of dysprosium- 165 with activity of 1100 counts per second was injected into the knee of a patient suffering from rheumatoid arthritis.
the standard free energy change delta G*T at 500K is equal to 9.8*10^4 J/mol. Calculte the equilibrium constant at 500 K.
What polypeptide would be synthesized from the following template strand of DNA:3' CGG AGA CGG ACG 5'. What is the amino acid sequence that is coded by mRNA sequence 5' AAG GCU AGU GGC 3'
a sample of gas occupies a volume of 400 ml at 0.740 atm and 70 oc. calculate the pressure of the gas if its volume is
A 1g sample of carbon obtain from material found in a ancient site gave 7900 carbon-14 disentegrations in a 20-hour period. In the same amount of time 1g of carbon from a source found yesterday under went 18,400 disintegrations.
draw a lewis structure of the molecule and indicate the number of bonds and orbitals used in bonding. Show electron configurations of the central bonding atom in both the unhybridized and hybridized states.
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