quiz 3 2017.docx - Question 1 5 out of 5 points Using the...

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Question 1 5 out of 5 points Using the phase diagram for pure water, what happens to molecular mobility as temperature increases at constant pressure? Selected Answer: molecular mobility increases Answers: molecular mobility decreases molecular mobility increases molecular mobility remains constant until the super critical point is achieved molecular mobility remains constant Question 2 0 out of 5 points Due to the fact that water is composed of two partially positive Hydrogen atoms and one partially negative Oxygen atom with two lone pair orbitals, water can hydrogen bond with ________ other water molecule(s), setting up a ________ structure. Selected Answer: 2; 1-dimensional Answers: 3; 3-dimensional 2; 1-dimensional 4; 3-dimensional 1; 1-dimensional Question 3 0 out of 5 points When liquid water freezes, the distance between the water molecules _______. Selected Answer: decreases Answers: increases does not change decreases first increases then decreases Question 4 0 out of 5 points Which of the following products possesses the least favorable conditions for yeast growth:
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Selected Answer: apples at 90% moisture content and a 0.97 Aw Answers: apples at 90% moisture content and a 0.97 Aw jam at 33% moisture content and a 0.86 Aw honey at 18% moisture content and 0.7 Aw bread at 36% moisture content and a 0.96 Aw Question 5 5 out of 5 points Each water molecule can hydrogen bond with 3 other water molecules.
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