Chemistry, 22.11.2019 06:31 12345678822
1unlike most vinyl polymers, poly(vinyl alcohol) (pva) is soluble in water. why is this? use chemical structures in your explanation. 2. when dissolving pva in water, why is it important that the temperature not exceed 80°c? 3. what chemical species are produced when borax dissolves in water? 4. the molecular weight for pva is about 95,000 g/mol. what is the molecular weight of a pva monomer unit? how many monomer units are in a pva molecule? (round to the nearest integer.) 5. draw the chemical structure of the repeating unit in the nylon polymer and circle the linking bond. 6. besides nylon, what other product is formed from the reaction of adipoyl chloride and 1,6- diaminohexane? 7 describe, in your own words, the three components that make up the structure of dna. where is dna located in the cell? 8. describe, in your own words, the three basic steps required to isolate dna. explain the purpose of each step.
Answers: 2
Chemistry, 22.06.2019 02:30, ulilliareinhart2
The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!
Answers: 2
Chemistry, 22.06.2019 08:00, stephstewart1209
Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.
Answers: 2
Chemistry, 22.06.2019 14:30, Dreynolds1667
100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)
Answers: 1
Chemistry, 22.06.2019 18:30, bibiansolis
The table lists the lattice energies of some compounds. compoundlattice energy (kj/mol)lif –1,036licl –853naf –923kf –821nacl –786which statement about crystal lattice energy is best supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf. the lattice energy increases as the cations get larger, as shown by lif and licl. the lattice energy decreases as cations get smaller, as shown by nacl and naf. the lattice energy decreases as the cations get smaller, as shown by naf and kf.
Answers: 3
1unlike most vinyl polymers, poly(vinyl alcohol) (pva) is soluble in water. why is this? use chemic...
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