Chemistry Homework Help: Answers & Questions Page 86

• Name the class of biopolymers that contains a peptide bond?

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• How does diffusion affect dynamic equilibrium?

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• The reaction between ammonia, oxygen and methane yield Hydrogen cyanide and the other product water. If the reaction vessel contains 11.5g,12.0g,10.5g of ammonia,oxygen and methane respectively,what is the maximum mass in gram of the cyanide that could ?

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• Why does an oil-and-vinegar salad dressing have two separate layers?

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• Which is a better unit for expressing molar mass, amu or grams/mole?

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• A certain substance has a heat of vaporization of 46.34 kJ/mol. At what Kelvin temperature will the vapor pressure be 5.00 times higher than it was at 323 K? Use the Clausius-Clapeyron equation.

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• When 1 mol of NaBH4 is used to reduce ketone, how many moles of hydride is used?

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• A gas thermometer is envisaged where by the change in V is used as a measure of temp change. At 1 atm what would the change in V as 42g of nitrogen gas goes from 15 to 20C? what difficulties can you envisage in using this system to measure room temp?

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• How many moles are there in 4.25x10(23) atoms of Au? Is it 4.25x10(23) x I mol Au/6.022x10(23) = 0.71 mols Did I do that correctly?

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• You are boiling potatoes on a gas stove, and your friend suggests turning up the heat to cook them faster. Will this idea work?

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• How many elements are nonmetals on periodic table?

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• What is the unit symbol for the prefix milli?

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• What is the formula for iron(II) oxide?

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• How would you find all the isomers of the formula C4H8O2 (ester)?

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• What is a solubility graph?

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• Describe how Avogadro's number is related to a mole of any substance?

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• What is the chemical formula for magnesium bromide?

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• What does Boyle's Law state?

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• When 2 moles of potassium chlorate crystals decompose to potassium chloride crystals and oxygen gas at constant temperature and pressure, 44.7 kJ are given off. What is the thermochemical equation?

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• How do you convert 2ft, 6 in to mm?

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• How do you calculate the degree of unsaturation?

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• Is pyrene an aromatic hydrocarbon?

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• Why does ice float instead of sink?

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• How do you convert 86 degrees Fahrenheit to degrees Celsius?

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• A chunk of silver has a heat capacity of 42.8 J/°C and a mass of 181 g. How do you calculate the specific heat of silver?

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• When chlorobenzene is steam distilled at 100kPa,the boiling point of the mixture is 91°C. At this temperature,the vapor pressure of chlorobenzene is 29kPa.What is the mass of the distillate that contains 100g of chlorobenzene?

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• What is the formula for carbon monoxide?

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• How might you prepare(in one step) copper(II) nitrate from copper(II) chloride?

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• Are single displacement reactions exothermic?

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• What is the set of chemical equations that describe the buffering action of phosphate buffered saline (PBS)? Calculate theoretically the pH of phosphate buffered saline.

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• Can anyone explain this? How and why does the chain length of surfactants affect CMC? How and why does the addition of a salt (eg., NaCl) affect the CMC?

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• Where in a multicellular animal does meiosis occur?

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• What is the net ionic equation that occurs when zinc nitrate and lithium phosphate are mixed together in water?

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• A sample of argon gas has a volume of 6 liters at a temperature of 7 °C. What volume does the gas occupy at 147 °C?

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• How many milliliters of water has been dispensed if the initial buret reading was 0.47 mL and the final is 26.18 mL?

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• Guys, i'm really confused. Who discovered the proton? Goldstein or Rutherford?

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• What is [OH-] in a solution having a pH 9f 13.56?

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• Is SO2 a liquid, a solid, or a gas at room temperature?

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• What element has a noble gas notation (Xe) 6s2?

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• What are the symbol & valence of carbon?

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• What is a homogeneous mixture?

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• Why should distilled water be boiled and cooled when determining its pH?

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• What is the product of acetamide and sodium hydroxide?

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• I have .400 mol of potassium sulfate (K2SO4), how can I calculate how many grams of potassium (K) I have? Does anyone know of a youtube video that will help me understand how to find the mass of just one element within a compound? Thank you!

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• What does the atomic number represent?

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• How can I convert from international units (IU) to milligrams or micrograms?

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• Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.?

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• Is the law of proportions the same as the law of constant composition?

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• What's the difference between polyatomic compounds and polyatomic ionic compounds?

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• Is sulfur a nonmetal?

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