Chemistry concepts and calculations

7 How many calories were needed to melt the solid? 2eno calo ulo TA order to mel

7 How many calories were needed to melt the solid? 2eno calo ulo TA order to melt solid o" needed 8. From your answer to CTQ 7, calculate the calories used per gram (cal/g) of thi…

7 Marks: 1 The activation energy for the isomerization ol cyclopropane to propen

7 Marks: 1 The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises fr…

7 Penicillin is an inhibitor of a peptidoglycan synthesis c. the enzyme transpep

7 Penicillin is an inhibitor of a peptidoglycan synthesis c. the enzyme transpeptidase d both (a) and (c) e. both (b) and (c) 8 Proteins known as lectins perform what function? a …

7 The flame side of the AA measures in parts per billion. Wh excitation for thes

7 The flame side of the AA measures in parts per billion. Wh excitation for these two kinds of the spectroscopy? asures concentrations in parts per million range and the furnace s…

7 combustion rex C12H22O11+12O212CO2+11H2O photosynthesis rex 11 H2O + 12 CO2 =

7 combustion rex C12H22O11+12O212CO2+11H2O photosynthesis rex 11 H2O + 12 CO2 = C12H22O11 + 12 O2 in combustion sucrose gives water and carbondioxide and in phothosynthesis water …

7 please help this is my 3rd time posting this A yo-yo has a rotational inertia

7 please help this is my 3rd time posting this A yo-yo has a rotational inertia of 1080 g.cm2 and a mass of 120 g. Its axle radius is 3.8 mm, and its string is 80 cm long. The yo-…

7 points Find the pH of a 0.078 acetic acid solution. The Ka for acetic acid is

7 points Find the pH of a 0.078 acetic acid solution. The Ka for acetic acid is 1.75 x 10^-5. 7 points Determine the pH of a 0.078M weak base Morpholine . The pKb is 5.51. 7 point…

7&8 please when 15.3 g of sodium nitrate. NaNO_3, was dissolved in water in a ca

7&8 please when 15.3 g of sodium nitrate. NaNO_3, was dissolved in water in a calorimeter. the temperature fell from 25.00 degree C to 2I.56 degree C. If the heat capacity of …

7) (7 points) A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO3)2 with 5

7) (7 points) A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO3)2 with 50.0 mL of 0.50 M Co(NO3)2. Sodium hydroxide is added to the mixture. What concentration of hydroxid…

7) . Each of the terms on the right side of the equation are either endothermic

7). Each of the terms on the right side of the equation are either endothermic or exothermic. Which answer properly depicts this. Endothermic, Exothermic, Endothermic Endothermic,…

7) 7) Read the length of the metal bar with the correct number of significant fi

7) 7) Read the length of the metal bar with the correct number of significant figures at 12 13 14 15 16 17 ric ERASER 1! cm A) 20 cm B) 15.000 cm C15 cm D) 15.0 cm E)15.00cm 8) De…

7) 7) What is the mass percent of oxygen in sodium oxide? SHOW ALL WORK A) 74.2

7) 7) What is the mass percent of oxygen in sodium oxide? SHOW ALL WORK A) 74.2 B) 25.8 C) 37.1 8) Bauxite is an ore that contains the element aluminum. If you obtained 108 grams …

7) A 5000ppm solution of Fe3+ must be prepared. This involves the use of 6M HNO3

7) A 5000ppm solution of Fe3+ must be prepared. This involves the use of 6M HNO3 and will need to be brought to 500mL total of solution. How many grams of Fe(NO3)3•9H2O [Iron Nitr…

7) A human with a body weight of 70 kg has a blood volume of 5.00 liter. The Hen

7) A human with a body weight of 70 kg has a blood volume of 5.00 liter. The Henry's Law constant for the solubility of N2 in blood is 9.04 x 104 Pa at 298 K. The density of blood…

7) A molecule that contaiss thrce identil polar bonds to the central wilb A) non

7) A molecule that contaiss thrce identil polar bonds to the central wilb A) nonpolar if the geometry is planar tg B) polar in all cases C) neepolar in all cases D) impossible to …

7) A physical change A) occurs when propane is burned for heat B) occurs when su

7) A physical change A) occurs when propane is burned for heat B) occurs when sugar is heated into caramel. C) occurs when water is evaporated. D) occurs when iron rusts E) occurs…

7) Design your protocol for your site-directed mutagenesis PCR reaction. The Qui

7) Design your protocol for your site-directed mutagenesis PCR reaction. The QuikChange kit provides this outline: X 1 of 10x reaction buffer X | (10 ng) of dsDNA template X11 (12…

7) Each gram of an ointment contains 2.5 mg of miconazote nitrate he available i

7) Each gram of an ointment contains 2.5 mg of miconazote nitrate he available in 50-g tubes. Calculate (a) the percent concentration the ointment and (b) the quantity of miconazo…

7) Enzymatic activity has a maximum temperature because* 0 the component amino a

7) Enzymatic activity has a maximum temperature because* 0 the component amino acids can fall off 0 the rate of reactions is o the side chains of essential residues O increasing t…

7) Glycogen synthase in glycogenesis is regulated by insulin and glucagon. Phosp

7) Glycogen synthase in glycogenesis is regulated by insulin and glucagon. Phosphorylated form of glycogen synthase is inactive and dephosphorylated for is active. A) Insulin stim…

7) How long doés it take light from the sun, 93 million miles away, to reach Ear

7) How long doés it take light from the sun, 93 million miles away, to reach Earth? (1 pt) 8) In astronomy, distances are measured in light years, the distance that light travels …

7) Identify one of the unknown proteins by following the instructions on the acc

7) Identify one of the unknown proteins by following the instructions on the accompanying handout and answer the que stions below about your protein. Last names starting with A-H …

7) If a reaction is exothermic, then a) ?S0 c) ?H0 9 ) What te

              7) If a reaction is exothermic, then             a) ?S<0           b) ?S>0           c) ?H<0          d) ?H>0 9) What term describes the structural relat…

7) Read the length of the metal bar with the correct number of significant figur

7) Read the length of the metal bar with the correct number of significant figures 12 13 14 15 16 17 cm B) 15.000 cm 15 cm D) 15.0 cm E) 15.00 cm A) 20 cm 8) Determine the solubil…

7) Suppose you are attempting the separation of three compounds (A, B, and C) by

7) Suppose you are attempting the separation of three compounds (A, B, and C) by column chromatography on silica gel. You start by running a number of TLC’s in order to find the b…

7) Suppose you have 0.10 M aqueous solutions of each of the following substances

7) Suppose you have 0.10 M aqueous solutions of each of the following substances: HINO, KCI, NH4CI, KOH, and NaC2H3?2. Place these solutions in order of increasing pH, that is, fr…

7) Suppose your crystal\'s density is 2.312 g/cm3. Use conversion factors to con

7) Suppose your crystal's density is 2.312 g/cm3. Use conversion factors to convert this to mg/l Show all your work and all your units throughout. Now to the doctor's office: 8) I…

7) The heat capacity of a gaseous mixture of hydrocarbons is required for some p

7) The heat capacity of a gaseous mixture of hydrocarbons is required for some process calculations. For this purpose, a sample of the gas is put in a glass flask and is initially…

7) The molecular-orbital model for Ge shows it to be A) a conductor, because all

7) The molecular-orbital model for Ge shows it to be A) a conductor, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large.…

7) The sp\'d atomic hybrid orbial set electron domains. A) 2 ?) ? D) 5 6 8) The

7) The sp'd atomic hybrid orbial set electron domains. A) 2 ?) ? D) 5 6 8) The formula of nitrobenzene is CaH NO. The molecular weight of this compound is A) 3.06 B) 107.11 C) 43.…

7) The tritium nucleus (H) consists of one proton and two neutrons. The mass ofa

7) The tritium nucleus (H) consists of one proton and two neutrons. The mass ofa 7) tritium nucleus is: A. equal to the mass of the proton plus the mass of the two neutrons. B. eq…

7) Tierra Helada, the elevation of 2800 to 4000 meters, is a good production zon

7) Tierra Helada, the elevation of 2800 to 4000 meters, is a good production zone for … coffee, maize, beans, citrus, squash and alegría. pygmy trees, grasses and mosses. sweet po…

7) Use the following thermochemical equations C 2 H 2 (g) + 5/2 O 2 (g) 2 C O 2

7) Use the following thermochemical equations C 2 H 2 (g) + 5/2 O 2 (g) 2 C O 2 (g) + H 2 O (g) H ° = - 1300 k J C 2 H 6 (g) + 7/2 O 2 (g) 2 CO 2 (g) + 3 H 2 O (g) H ° = - 1560 k …

7) Using Figure 1, what type of drainage pattern would you expect in this region

7) Using Figure 1, what type of drainage pattern would you expect in this region? A. Dendritic B. Radial C. Trellis D. Rectangular E. None of the above 8) What is the term used fo…

7) What is a \"gauss\" and how does it compare to the tesla? 8) If a charged par

7) What is a "gauss" and how does it compare to the tesla? 8) If a charged particle moves in a straight line through some region of space, can you say that the magnetic field in t…

7) What property (behavior) of the substances are you exploiting in each case? E

7) What property (behavior) of the substances are you exploiting in each case? Explairn. a) b) 8) An explorer finds a huge container with a clear liquid, colorless liquid in it. H…

7) What property (behavior) of the substances are you exploiting in each case? E

7) What property (behavior) of the substances are you exploiting in each case? Explairn. a) b) 8) An explorer finds a huge container with a clear liquid, colorless liquid in it. H…

7) Which of the following is a STRONG acid? HCIO4 D) NH4 E) H20 8) Which of the

7) Which of the following is a STRONG acid? HCIO4 D) NH4 E) H20 8) Which of the following is a WEAK acid? A) HC104 B) H2S04 E) HNO3 9) Which of the following solutions would have …

7) Which of the following processes is endothermic? 7) A) the combustion of dies

7) Which of the following processes is endothermic? 7) A) the combustion of diesel B) the chemical reaction in a "hot pack often used to treat sore muscles C) a hot cup of soup (s…

7) Which of the following species is amphiprotic? A) HF NH4 D) HPO42- E) None of

7) Which of the following species is amphiprotic? A) HF NH4 D) HPO42- E) None of the above are amphoteric 8) In a reaction mixture containing only reactants, what is the value of …

7) Which of the following statements best describes the location of the water mo

7) Which of the following statements best describes the location of the water molecules in the crystal structure of the DNA double helix? [Hint: make the water molecules visible a…

7) Why does units of the rate constant, \'k\', differ according to the orders of

7) Why does units of the rate constant, 'k', differ according to the orders of reactions rate orders? 8) What are the 4 factors affect reaction orders? 9) What is the half-life fo…

7) b. Based on the comparison of size and Zeff, which of the three values of Ksp

7) b. Based on the comparison of size and Zeff, which of the three values of Ksp listed in question 5 would Coulomb’s Law predict for beryllium hydroxide’s Ksp? c. Based on the co…

7) synthesize t-butyl isobutyl ether from isobutylene IX. Purification (8 points

7) synthesize t-butyl isobutyl ether from isobutylene IX. Purification (8 points) Indicate the best method to purify the following mixture. A mixture of 2-methyiphenol, benzylalco…

7) which statement is not true for the following structure: 7) Which statement i

7) which statement is not true for the following structure: 7) Which statement is NOT true for the following structure CH20H CH20H HO H OH H H H OH A) There are two oses and 0 fur…

7) with thermodynamics, one cannot determine (blank). 8) the value of deltaS for

7) with thermodynamics, one cannot determine (blank). 8) the value of deltaS for the catalytic hydrogenation of acetylene to ethene, C2H2 + H2 --> C2H4, is ? 9) the value of de…

7, A constant current supply is set to deliver 250 mA. It is applied to a 15 res

7, A constant current supply is set to deliver 250 mA. It is applied to a 15 resistor. What is the voltage across the resistor? 8, A real 1.5 V battery has an internal resistance …

7, For a certain reaction of the general form aA products, a plot of the experim

7, For a certain reaction of the general form aA products, a plot of the experimental data as in A versus time is linear. What is the reaction order with respect to reactant A? (2…

7, Sod:unn acetal! + water\" sodium hydroxide (aq) + acetic acid (aq) Observatio

7, Sod:unn acetal! + water" sodium hydroxide (aq) + acetic acid (aq) Observation: N° visible ch6Tp5 Balanced Formula Equation Complete lonic Equation: Net lonic Equation: hydratce…

7, involving carbocations are common for which of the following reactions? Ill.

7, involving carbocations are common for which of the following reactions? Ill. I. hydration of alkenes II. alkenes in catalytic hydrogenation of to alkenes base IV. electrophilic…