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Can you name and describe the forces present once you mix H2O with MgCl2? Can you explain why they form too.
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- 1. When a chunk of dry ice (solid carbon dioxide) is placed out in the air, the solid gradually disappears and a gas is formed above the solid. Does it go through chemical or physical change has occurred? Explain. 2. When the molecules of the solid CO2 becomes free upon exposure to the air. What happened to the bonds of the molecule?Consider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.) Substance Melting Point (°C) Molar Mass (g/mol) Cl2 −102 71 Ethyl formate (CH3CH2OCHO) −80 74 Propionic acid (CH3CH2COOH) −20 74 Br2 −7.2 160● Explain why higher average kinetic energy results in higher vapor pressure in terms of IMFs.
- 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?please help explain in detail the specRoom temperature: 295.9 K Barometric pressure: 769.0 mmHg Vapor of water: 21.1 mmHg Volume of O2 collected: 59.20 mL Density of H2O2: 1.01 g/mL % Composition H2O2: 3.02 % Volume of H2O2 used: 5.00 mL Letter of the unknown solution of H2O2: C Volume of O2 collected for the unknown: 64.90 mL Calculate R in the ideal gas law.
- Room temperature: 295.9 K Barometric pressure: 769.0 mmHg Vapor of water: 21.1 mmHg Volume of O2 collected: 59.20 mL Density of H2O2: 1.01 g/mL % Composition H2O2: 3.02 % Volume of H2O2 used: 5.00 mL Letter of the unknown solution of H2O2: C Volume of O2 collected for the unknown: 64.90 mL Calculate the mass of O2:Two students plan and carry out an investigation to determine if ionic or covalent bonds have stronger intermolecular forces; they use salt and sugar. They collect the following data: Sugar (covalent) white Salt (ionic) white rough, very small grains rough, small grains soluble soluble melts easily does not melt Which of the following tests will most help them to infer the strength of intermolecular forces between ionic and covalent compounds? Color Texture, grain size Solubility in water Melting point 58°F Clear 99+Please answer question 3ab
- What is the term used to describe the electrostatic attraction of the electrons of one molecule or atom for the nuclei of another? Covalent bonding Van der Waals attraction Ionic bonding Hydrogen bondingWhich of the following compounds is expected to have the highest melting point? MgO BaS CaCl2 K2O SrSeWhich of the following has a higher melting point: NH4NO3 or H2O? Explain your reasoning, including the attractive forces present in both compounds.
