Polymers Questions and Answers

A person dissolves 120g of NaCl in 100mL of water. If the person dilutes their solution by adding another 300mL of water, what mass, in grams, of sodium chloride (NaCl) will be in the new solution? 12g 75.2g 120g 1200g 98.6g

In an alkane series of hydrocarbons, as the number of carbon atoms increases in a chain, the normal boiling point of each successive molecule - increases decreases remains the same

What is the ratio of the average rate of effusion of NOF(g) to that of HBr(g) at 400 K? YOU MUST WRITE THE CALCULATION FOR FULL CREDIT 81:49 The average rate of effusion is the same for the two gases. 7:9 9:7 49:81

Solid aluminum (Al) and chlorine (C1₂) gas react to form solid aluminum chloride (AIC13). Suppose you have 11.0 mol of Al and 5.0 mol of Cl₂ in a reactor. What would be the limiting reactant? Enter its chemical formula below.

Which statement concerning proteins is not correct? A) Proteins are long, usually folded, chains. B) The shape of a protein molecule determines its function. C) Proteins can be broken down and used for energy. D) Proteins are bonded together, resulting in simple sugars.

What types of lipids have been used? triacylglycerols, glycerophospholipids sphingolipids, glycosphingolipids, waxes sphingolipids, steroids, prostaglandins waxes, triacylglycerols glycerophospholipids, sphingolipids

For the following reaction, 0.122 moles of bromine are mixed with 0.120 moles of chlorine gas. bromine(g) + chlorine(g) → bromine monochloride (g) What is the formula for the limiting reagent? What is the maximum amount of bromine monochloride that can be produced?

Pheromones are a special type of compound secreted by the females of many insect species to attract the males for mating. One pheromone has the molecular formula C10H16O. Normally, the amount of this pheromone secreted by a female insect is about 1.60 × 10^-12 g. How many molecules does this quantity contain? Enter your answer in scientific notation.

The illustration to the left represents a mixture of iodine (purple) and fluorine ( green) molecules. If the molecules in the above illustration react to form IF3 according to the equation I2+3 F₂ ---> 2 IF3 the limiting reagent is the number of IF3 molecules formed is, and the number of atoms/molecules in excess is

The atomic masses of 35C1 (75.53%) and 37C1 (24.47%) are 34.968 amu and 36.956 amu, respectively. Calculate the average atomic mass of chlorine. The percentages in parentheses denote the relative abundances.

What is an autoimmune disease? a disease caused by an immune system that cannot produce antibodies or T cell responses a disease caused by an inappropriate immune response to self antigens a disease caused by a severe immune response to a normally innocuous environmental antigen a disease caused by an inappropriate immune response that overproduces cytokines to a toxic level

Gadolinium (Gd) is element 64 on the periodic table. Calculate the amount (mol) Gd in 2.54 g Gd.

What is the empirical formula for vinegar?

If pressure increases, which of the following variables would decrease? Assume all other variables are held constant. a. Temperature b. Moles c. Volume d. Both Moles & Volume e. Both Temperature & Volume

A sample of Sc weighs 96.7 grams. Will a sample of Be that contains the same number of atoms weigh more or less than 96.7 grams? Calculate the mass of a sample of Be that contains the same number of atoms.

What is the name of the following compound based on the Lewis-Dot structure? (SC.912.P.8.7) a. sulfur oxide b. sulfur trioxide c. monosulfur oxide d. monosulfide trioxide

Draw the structure of each amino acid below at low pH (pH= 1), pH = 7.4 and high pH (pH = 14) and classify it as polar or nonpolar. If polar, indicate if the R group is neutral, acidic or basic. Indicate if each is hydrophobic or hydrophilic. a. lysine b. proline c. valine d. tyrosine

What is the theme of this poem? Beauty always gives Joy. One has to lead a spiritual life. The thoughts of people change as the season does. Beauty can be used to raise the spirits in times of gloom.

When solid red phosphorus, P4, is burned in air, the phosphorus combines with oxygen, producing a choking cloud of tetraphosphorus decoxide. Choose the unbalanced chemical equation for this reaction. P3O2 (9)→ P4 (s) + O2(g) P4(s) + N2₂ (9)→ P4N10 (9) P4 (s) + O2(g) → P4O10 (9) P4(s) + H₂O(1)→ P₂O10 (9)

A double-blind study is one in which neither the researchers nor the subjects know whether the subject is receiving the real treatment or the placebo. What is the value of this kind of study? A. The researchers cannot replace the placebo with the real treatment for their favorite subjects. B. Neither the subjects nor the researchers can bias the results. C. The subjects are not irritated by the fact that they are not receiving the real treatment. D. Neither the subjects nor the researchers are able to interpret the results.

Give the symbol for each element. a. arsenic, an element used in especially potent poisons b. zirconium, a component in some abrasives such as sandpaper c. rhenium, a metal used as filaments in mass spectrographs and in ion gauges d. potassium, an essential mineral micronutrient in human nutrition

Which of the following can be inferred on the commonalities between Dimmesdale and Chillingworth? (A) Dimmesdale and Chillingworth claim that Hester belongs to them (B) Dimmesdale and Chillingworth conceal their relationship with Hester and make her the sole sufferer. (C) Dimmesdale and Chillingworth revealed their guilt and proved that Hester is innocent (D) Dimmesdale and Chillingworth were ready to suffer any punishment for Hester.

"Q", the reaction quotient, is used to... (A) Determine the concentration of reactants and products at equilibrium. (B) Determine if the reaction is exothermic or endothermic. (C) Determine if the reaction is at equilibrium. (D) None of the above

Which of the following processes causes the free radical bromination of methane to be slower than the equivalent free radical chlorination? (A) initiation (B) hydrogen abstraction (C) halogen abstraction (D) termination. (E) entropy

A metal with a specific heat of 0.70 J/gC and a mass of 8.00 g has a temperature change of 48.0 degrees. How much heat was added?

The reaction 3O₂(g) → 2O₃ (g) with a value of △H = -286 kJ _________. a. is endothermic and absorbs heat energy overall b. is exothermic and releases heat energy overall c. is spontaneous because energy is produced

What term describes the structural relationship between cis-1,2 dimethylcyclopentane and trans-1,2-dimethylcyclopentane? A) not isomers B) constitutional isomers C) enantiomers D) diastereomers E) conformers

Using (3) compute the crystal field splitting for each of the complex ions. Convert your answers to kJ/mol. Record these values. Finally examine each of your plots and determine if the color seen is consistent with each of the A vs. A spectra. A simple yes or no answer is not sufficient. Justify your answers.

a) The reaction of two amino acids such as Glycine and Alanine generate a peptide bond and water as a by-product. Draw the peptide bond generated between these two Amino acids. 2- Show the resonance structure for the bond you just drawn.

A sample has a measured temperature of 764.2 °C. What is its temperature in °F?

How much energy is required to raise the temperature of 12.3 grams of solid iron from 23.4°C to 36.9°C? The specific heat of iron is 0.106 cal/g °C.

How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 88.1 moles of water vapor? Express your answer with the appropriate units. ▸ View Available Hint(s) 0 Value Units PIN ?

Match each variable to the corresponding scenario. number of moles of gas pressure temperature Steve buys a helium-filled balloon for his birthday in January, On his walk home, Steve notices the balloon seems deflated. He decides that it must be leaking, so he takes the balloon back into the store. While in line he realizes that the balloon is not leaking after all, and has returned to its original volume. In addition to volume, what variable changed during Steve's trip? Steve realizes that his racquetball no longer bounces well. Instead of buying a new one, he heats up the old one using a hair dryer. It now bounces even better than new, as long as it remains hot. In addition to temperature, what variable changed? Two balloons in a balloon bouquet have volumes of 2.24 L and 448 L, respectively. In addition to volume, what variable is different for the two balloons? A balloon containing helium gas has a pressure of 1 atm at ground level. As it rises, the pressure decreases by 50%, but the temperature remains constant. In addition to the pressure, what variable must have changed? Answer Bank volume