Answers created by il maestro

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• #1 xx 10^21# molecules are removed from #280" mg"# of carbon monoxide. Calculate the number of moles of carbon monoxide left? [Answer:#8.4 xx 10^- 3" moles"#]
  
• What functional groups are found in the structure of melatonin?
  
• What is the IUPAC name of the given compound?
  
• The temperature inside my refrigerator is 3.18 Celsius. If I place a balloon in my fridge that initially has a temperature of 22.2 degrees Celsius and a volume of 0.577 L, what will be the volume of the balloon when it is fully cooled in my refrigerator?
  
• Which of the following liquids will have the lowest freezing point?
  
• Calculate the total number of open chain isomeric carbonyl compounds of molecular formula #C_5H_8O# which can't show geometrical isomerism?
  
• Which is an alkyl group? 1) C6H12 2) C6H13 3) C6H14 4) C6H15
  
• How many liters of #C_3H_8# are in #1.505 xx 10^23# molecules of #C_3H_8#?
  
• Why can ethanol be considered both a Lewis acid and a Lewis base?
  
• How many structural isomers are possible with the molecular formula C6H14?
  
• Iron is obtained commercially by the reaction of hematite #Fe_2O_3# with carbon monoxide. How many grams of iron is produced when 25.0 mol of hematite reacts with 30.0 mol of carbon monoxide?
  
• 100 liters of water for softening needed 15.9 grams of #Na_2CO_3#. What was the hardness of water?
  
• Make 30.0 mL of H2 gas from the reaction of 6M HCL and Aluminum. How do I do the Stoichiometry for this problem?
  
• Could anybody explain why the alpha hydrogen of the Carbon of acetophenone takes part in the aldol condensation reaction and not that of the one conjoined to the phenyl ring?
  
• For the reaction 2 H 2 + O 2 → 2 H 2 O , how many moles of water can be produced from 10.3 mol of oxygen?
  
• One of the hydrides of boron has molar mass=122.22g/mol and is 11.55% by mass hydrogen. Determine its molecular formula?
  
• What is the difference between enantiomers and chiral molecules?
  
• What happens? when ethyl Chloride is treated with sodium in dry ether. ( write reactions only)
  
• You have 10 grams of C10H10O2. How many moles are present? How many molecules are present?
  
• Why diethyl ether behavior as a base?? Explain
  
• Ozonolysis?
  
• A 0.2 mol sample of N2 , CO2 with a pressure of 840 torr is exposed to solid CaO which react with theCO2 to form solidCaCO3 assume the reaction goes to completion complete pressure the gas had dropped to 320 how many moles of CO2 in origin mixtur? how
  
• Question #c5f12
  
• An alkane C8H18 is obtained as the only product on subjecting a primary alkyle halide to Wurtz reaction.On monobromination this alkane yields a single isomer of a tertiary bromide .What is the structure of alkane and tertiary bromide?
  
• How can I make acetophenone from benzene?
  
• A mixture of #"N"_2#, #"O"_2#. and #"CO"_2# has a total pressure of #"740 torr"# In this mixture, the partial pressure of #"N"_2# is #"120 torr"# and the partial pressure of #"O"_2# is #"400 torr"#. What is the partial pressure of #"CO"_2# ?
  
• Question #69afb
  
• Question #c9e79
  
• Are aldehydes toxic to humans? If so, what makes glucose less toxic?
  
• This is the question of organic chemistry."W" &"X"are optically active isomer of C5H9Cl."W" on treatment with one mole of H2 converted into optically active compound "Y"but "X" gives an optically active compound "Z"under the same condition.please read?
  
• Flexible plastic container with 0.86 g of 19.2 L helium gas. If you remove 0.205 grams of helium gas in continuous pressure and temperature, what is the new size?
  
• Question #281de
  
• Is pyrrole aromatic?
  
• How can you distinguish between primary, secondary, and tertiary alcohols?
  
• Why is #BF_3# an electrophile?
  
• Which of the following is an ether? How can you tell?
  
• What coefficient would the #O_2# have after balancing #C_4H_8 + O_2 -> CO_2 + H_2O#?
  
• How many constitutional isomers does C3H8O have?
  
• How does Sp3 hybridization work for Nitrogen in #NH_2^-# ?
  
• What is the molecular formula for a #"164.2 g"# sample of a compound that contains #"46.92 g K"#, #"38.52 g S"# and oxygen? The molecular weight of the compound is #"270.4 g/mol"#.
  
• How can you use nucleophilic substitution to create an alkane from a halogenoalkane?
  
• Question #3cfec
  
• How many chiral centers are there in thromboxane B2?
  
• What would be the major product obtained from hydroboration–oxidation in 2-methyl-2-butene?
  
• Question #01e00
  
• Question #635c0
  
• A supply of NaOH contains the contaminants NaCl and MgCl2. A 4.9995g sample of this material is dissolved and diluted to 500mL, 20mL of this is titrated with 22.26mL of a 0.1989M solution of HCl. What is the percent NaOH of the original solution?
  
• Question #fa00c
  
• Is 3,4-diethylhexane a meso compound?
  
• How many asymmetric centers and stereoisomers does 1-Bromo-3-methylcyclohexane have?
  
• Why are secondary and tertiary amines less soluble than primary amines of similar molecular size?
  
• Is ( R )-lactic acid dextrorotatory or levorotatory?
  
• How many straight-chain isomers are there of hexene, #C_6H_12#?
  
• How many epimers are there of D-glucose? Of #alpha#-D-glucose?
  
• Does the solvent determine whether an alkyl halide will undergo an SN1 or an SN2 reaction?
  
• Question #d77c8
  
• Question #cee00
  
• How do alkyl groups stabilize carbocations?
  
• Why is tertiary carbocation most stable?
  
• Question #f0c3c
  
• Question #b2e84
  
• Question #885cc
  
• How do you calculate the pH of a buffer solution?
  
• What is the most likely mechanism and the product from the reaction between 2-chloro-2-methylpentane and sodium ethoxide in ethanol?
  
• What are the structural isomers of cyclic C5H8CL2?
  
• What colligative property causes ice to melt?
  
• Which molecule contains a triple bond ? A) HCN B) F2 C) O3 D) H2CO
  
• Question #12a0e
  
• Identify the substance oxidized, the substance reduced, the oxidizing agent, and the reducing agent? 2HNO3 + 3H3AsO3 -----> 2NO + 3H3AsO4 + H2O
  
• Question #8e3b0
  
• Question #7a067
  
• Is water a nucleophile?
  
• Given the chemical equation #"N"_2("g") + "3H"_2("g")"##rarr##"2NH"_3("g")"#, how many moles of #"NH"_3"# can be produced if #"10. mol H"_2"# reacts completely with nitrogen?
  
• Question #01ad0
  
• Question #fe38a
  
• Question #d0030
  
• A volume of saline solution weighed 25.6 g at 4 degrees C. An equal volume of water at the same temperature weighed 24.5 g. what is the density of the saline solution?
  
• The valve connecting a 2.00 L bulb containing N2 at 530 torr and a 3.00 L bulb containing O2 at 195 torr is opened. After equilibration what is the total pressure, in atm, in the system?
  
• Question #d8265
  
• What molecular formula represents a carbohydrate?
  
• How does temperature affect voltage in a galvanic cell?
  
• What is produced when #CH_3CONH_2# reacts with NaOBr? Is NaOBr a product of (or equivalent to) #Br_2 + NaOH# which are used in the Hoffmann bromamide degradation reaction?
  
• Gallium has an atomic mass of 69.723. The Ga-69 (68.926 amu) is 60.11%. What is the amu of the other isotope? I'd like to know the set up-thought it was (69.723)(0.6011) + (x)(0.3989)? But it isn't giving me the right answer.