PHYS 200 Lab Report 4

Which statement about bulk properties of matter and the electrostatic forces between molecules is correct? The bulk properties of a material determine the strength of the electrostatic forces between molecules. Bulk properties can be changed to strengthen or weaken the electrostatic forces between molecules in a material. The bulk properties of a material can be inferred by measuring the strength of the electrostatic forces between molecules. Bulk properties can be used to compare the strength of electrostatic forces between molecules in different materials.

3379 Which of the following Homeowners policies provides coverage for damage caused to a roof by the weight of accumulated ice and snow? a. HO-0 Form b. HO-1 Form c. HO-2 Form d. HO-4 Form

Why does surface tension allow the fly fisherman’s hook to float on water?

Copper wire which has an area of 2.9 x 104 m² is pulled in tension with 44,500 N force, producing only elastic deformation. Calculate the resulting strain if the modulus of elasticity is 110 x 102 MPa. 0.03190 0.01390 0.00319 0.00139

Answer questions 4-5

1. ReShayla was making pancakes and decided that she wanted hot syrup on her pancakes. As she poured the syrup into a bowl, it came out slowly. After she heated it in the microwave for a few seconds, she poured the syrup onto her pancakes and it came out quickly. Why did the syrup come out quicker after she warmed it up? a. Its surface tension decreased because the radiation from the microwave broke the intermolecular forces it had. b. The radiation from the microwave increased its viscosity by breaking the syrup's intermolecular forces. c. Its surface tension increased because the radiation from the microwave broke the intermolecular forces it had. d. The radiation from the microwave decreased its viscosity by breaking the syrup's intermolecular forces. 2. The energy to change one mole of a substance from a liquid to a vapor at its boiling point is a. molar heat of fusion b. molar heat of vaporization c. molar heat of boiling d. critical heat 3. Dr. Rodriguez-Bussey measures the…

...elting point enthalpy of fusion temperature (°C) 80 70 60 50- 40- 30 You may also assume X behaves as an ideal gas in the vapor phase. Suppose a small sample of X at -20 °C is put into an evacuated flask and heated at a constant rate until 10.0 kJ/mol of heat has been added to the sample. Graph the temperature of the sample that would be observed during this experiment. 20- 10- 0 -10- -20 density 0 1 2 3 30. °C 4.00 kJ/mol 3 3.00 g/cm³ (solid) 2.30 g/mL (liquid) 4 5 6 7 heat added (kJ/mol) 8 9 boiling point enthalpy of vaporization 10 heat capacity × 60. °C 34.00 kJ/mol 1 1 29. J.K¹·mol ·mol (solid) - 1 56. J.K mol (liquid) 1 44. J∙K¯¹·mol (vapor) Ś -1

Answer this chemistry question please.

Question 11 Intramolecular forces primarily impact the chemical properties of substances or impact the physical properties of substances? Physical properties Chemical properties

Fill in the blanks with the appropriate word or phrase.  1. The average kinetic energy of a gas molecule depends only on its _____. 2. Above it's ____ temperature, it is imposible, under any any pressure, for a substance to exist in its liquid phase.  3. For a crystalline solid, the smallest repeating structure is referred to as the _____  ______. (Two words) 4. The scattering of light off colloidal particles is called the _____ effect.  5. A solution in which there is more dissolved solute than in a saturated solution is known as a(n) ______ solution.

Identify the predominant intermolecular force in each of these substances. Incorrect Hydrogen bonding H₂O OH CH3CCH3 OH O CH3COCH 3 NH, Dipole-dipole Answer Bank Dispersion (London) forces CH₂

Based on the kinetic molecular model, solids usually have higher densities compare two liquids. However, ice , a solid form of H2O floats on liquid water which means ice is less dense than water. What do you think is the reason for this phenomenon? What is the biological significance of this concept?