Chemistry Homework Help: Answers & Questions Page 85

• How do the specific heats of metals compare with water?

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• How many atoms are present in 48.60 g of Mg?

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• What does S configuration mean?

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• Why water is considered as pure substance whereas air is considered as impure substance?

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• What hydrogen bonds join cytosine to guanine?

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• HCN toxixity is:? 1- change osmotic pressure inside the cell 2- disturbance of acid-base equilbrium in body 3- covalent bonding to heme ion

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• The density of gold is ##19.3 g####/####cm^3##. What is the volume, in ##cm^3##, of a sample of gold with mass ##0.715## ##kg##? If this sample of gold is a cube, how long is each edge in ##cm##?

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• How does a polar covalent bond differ from an nonpolar?

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• Why are Van der Waals interactions important to the tertiary structure of proteins?

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• What is the valence electron configuration for carbon?

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• Why does aluminium react with iron oxide? Could you please explain all of the basics of it . I thought iron was stable

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• How can molecules with polar bonds be nonpolar?

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• How much would be the volume of ice formed by freezing one liter of water?

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• How did J.J. Thomson change the model of the atom?

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• Magnesium metal (0.100 mol) and a volume of aqueous hydrochloric acid that contains 0.500 mol of HCl are combined and react to completion. How many liters of hydrogen gas, measured at STP, can be produced? ##"Mg"(s) + 2"HCl"(aq) -> "MgCl"_2(aq) + "H"_2(g...

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• Show practically the oxidation state of O2 in Na2O2?

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• What are some examples of solutions?

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• What is the vsepr model for CHCl3?

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• Define oxidation number?

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• Can you write the nuclear decay equation for the beta decay of iodine-131?

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• What are some examples of ionic compounds?

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• Is Triethylamine (CH3CH2)3N polar or nonpolar ?

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• Compare the structures and functions of the biomolecules lipids and starches?

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• Why is atmospheric pressure measured at sea level?

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• How can chemistry help us in the future?

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• Is there any difference between bond energy and bond dissociation energy?

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• How does soap work?

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• What is the molar mass of iron?

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• How can ionic compounds dissolve in water?

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• What are the physical and chemical properties of common table salt?

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• What mixtures can be separated by physical means?

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• How can I determine the van't Hoff factor of a substance from its formula?

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• What is the mass number of an ion with 107 electrons 159 neutrons and a +1 charge?

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• What does percent composition mean?

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• What is the ground state electron configuration of calcium ,titanium, rhodium lead, and erbium?

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• Which one of the following is most reactive? 1.Cl2 2.Br2 3.I2 4.ICl

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• What is the color of phenolphthalein indicator in an acidic solution? In a basic solution?

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• Why is PbSO4 Insoluble in water?

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• Vanillin, a flavoring agent, is made up of carbon, hydrogen, and oxygen atoms. When a sample of vanillin weighting 2.500 g burns in pure oxygen, 5.79 g of ##CO_2## and 1.18 g of water are obtained. How would you calculate the empirical formula of vanillin?

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• How does dilution affect the reaction rate?

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• How would you write the formula of the conjugate base of the Bronstead-Lowry acids H2SO3 and HI?

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• What is the ground state electron configuration of oxygen?

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• What are some properties of nascent oxygen?

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• Use the formula ##2n^2## How many electrons could energy level five have?

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• A 1.50 L buffer solution is 0.250 M HF and 0.250 M NaF. What is the pH of the solution after the addition of 0.0500 moles of solid NaOH? Assume no volume change. Ka for HF is 3.5x10^-4

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• How do you calculate limiting reagent and theoretical yield?

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• Your local weather report announces that the barometric pressure is 30.44 inHg. Convert this pressure to psi.? Convert a pressure of 23.8 in Hg to kPa

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• How can I balance this chemical equations? Aluminum and hydrochloric acid react to form aluminum chloride and hydrogen gas.

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• Why does KCN give -CN nucleophile while AgCN gives isocyanide?

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• How did J.J. Thomson change Dalton's atomic theory?

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