Chemistry Homework Help: Answers & Questions Page 77

• Which ionic compounds are insoluble in water?

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• How does molality affect the freezing point?

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• Please let know how is Electronegativity value in Halogen family? I am really unclear. Thank you.

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• What are examples of physical changes? Chemical changes?

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• What causes bond polarity?

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• How would you represent potassium and bromine using an electron dot diagram? How about KBr?

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• What is Hydrogen?

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• Finding the empirical formula of iron oxide?

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• Is NF3 an acid or a base?

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• What covalent compound is SCl4?

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• What is Iodoform test?

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• How do you write the formula of zinc oxide?

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• The mass solubility of CaF2 in water is 0.016 g/L in water. What is the molar concentration of fluoride ions in a saturated solution of CaF2? And what is the value of Ksp for CaF2?

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• Where is the electron cloud located in the atom?

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• What it the chemical equation for sugar with potassium nitrate?

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• How can I balance this chemical equations? hydrogen gas and nitrogen monoxide react to form water and nitrogen gas

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• Is ##Ba(NO_3)_2## ionic or covalent? What is its name?

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• What are the intermolecular forces of CHF3, OF2, HF, and CF4?

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• What are the key points in Dalton's atomic theory

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• What is the formula for calcium hydroxide?

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• What is solubility?

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• At what temperature, the hydrogen molecules will have same kinetic energy as nitrogen molecules at 280 K?

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• What would be the major product obtained from hydroboration–oxidation in 2-methyl-2-butene?

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• How do you solve the Arrhenius equation for ##T_2##?

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• What does the percentage of M.F. on the yogurt mean?

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• What is the difference between an aldose and a ketose?

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• How do independent variables differ from dependent variables?

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• What is the Luster, Specific Gravity, Cleavage and Transparency of Aluminum (Al)?

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• What is the relationship between diatomic molecules and diatomic elements?

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• What is the product of the aldol condensation between cyclopentanone and 4-methylbenzaldehyde?

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• How can you determine periodic table charges?

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• How many moles of atoms are in 3.00 g of ##""^13C##?

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• At what temperature is the concentration of a saturated solution of ##KCl## (molar mass 74.5 g) approximately 3 molal?

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• How many pi bonds are formed when sp2 hybridization occurs in ethene, C2H4?

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• How does the law of conservation of energy apply to calorimetry?

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• You find 7g of Nitrogen in 0.50 dm^3. Whats the mass?

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• What are some examples of Ion-dipole forces?

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• How do polar covalent bonds dissolve in water?

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• What is the Lewis electron-dot diagram for a fluoride ion?

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• What is the isotope notation for chlorine?

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• Can you compare the location of bonding electrons in a polar covalent bond with those in a nonpolar covalent bond?

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• Convert 255 mmHg into atm. And convert 620 torr into psi

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• Heating potassium chlorate produces potassium chloride and oxygen gas. The balanced equation for this decomposition reaction is below. Calculate how many moles of oxygen gas are formed from 6.32 grams of potassium chlorate? 2 KClO3 = 2KCl + 3 O2

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• Solutions of barium nitrate and sodium sulfate are mixed, and a precipitate of barium sulfate is formed. Why is barium sulfate the only compound that precipitates when the solutions are mixed?

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• Can you write the equation for the oxidation and reduction half-reactions for the redox reactions below, and then balance the reaction equations? a. MnO2 + HCl --> MnCl2 + Cl2 + H2O b. S + HNO3 ---> SO3 + H2O + NO2

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• A ##1/4## inch thick lead sheet is used for protection from medical x-rays. If a single lead atom has a diameter ##350## pm, how many atoms thick is the lead sheet?

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• How do you express a mass of 0.014 mg in grams?

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• Why can transverse waves not be produced in gases?

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• What is the electron configuration for aluminum?

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• What electron charge is copper?

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