1) You have a piece of solid iron containing 2.60 moles of atoms. Suppose one atom...
1) You have a piece of solid iron containing 2.60 moles of atoms. Suppose one atom in 1012 were missing one electron. What would be the net charge on the iron?
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1) You have a piece of solid iron containing
2.60 moles of atoms. Suppose one atom...
What net charge would you place on a 112 g piece of sulfur if you put...
What net charge would you place on a 112 g piece of sulfur if you put an extra electron on 2 in 1012 of its atoms? (Sulfur has an atomic mass of 32.1 grams per mole.) Give your answer in microcoulombs. Remember that extra electrons result in negative charge!
Iron atoms have been detected in the sun's atmosphere, some with many of their electrons stripped...
Iron atoms have been detected in the sun's atmosphere, some with many of their electrons stripped away. What is the net electric charge (in coulombs) of an iron atom with 26 protons and 12 electrons? Be sure to include the algebraic sign (+ or -) in your answer. Please help!
problem set 6 2. Magnetite Fe,O, is an iron containing ore. How many moles of iron...
problem set 6
2. Magnetite Fe,O, is an iron containing ore. How many moles of iron atoms would be found in 2.5 moles of magnetite? How many atoms of iron would this be? Show all work 3. Consider the following pairs. For each pair, circle the quantity that contains the greater number of atoms or molecules Then explain your reasoning a) 1 mole Na or 1 gram Na b) 1 molecule of lz or 1 mole of la C) 58.9...
Pyridine, C5H5N, is a 6-membered ring containing the C atoms and the N atom. Aniline, [C6H5(NH2)]...
Pyridine, C5H5N, is a 6-membered ring containing the C atoms and the N atom. Aniline, [C6H5(NH2)] , is a hexagonal ring of 6 C atoms with a NH2 group attached to one of the C atoms in the ring (1) For each of the above molecules, draw (the) equivalent resonance structure(s) AND resonance structures that involve (introduce) a +1 and a -1 formal charge. (2) These molecules are Bronsted-Lowry bases – molecules containing at least one atom with a nonbonding...
Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+...
Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+ to Fe 3+. a) Would the net charge of the crystal be positive or negative? b) Explain why each of the following defects would or would not be reasonable to regain charge balance: O 2- vacancies O 2- interstitials Fe 2+ vacancies Fe 2+ interstitials c) what ratio of these defects above to Fe 3+ is needed for charge neutrality ? d) Ionic materials...
Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+...
Suppose that some of the iron atoms in the ceramic FeO are oxidized from Fe 2+ to Fe 3+. a) Would the net charge of the crystal be positive or negative? b) Explain why each of the following defects would or would not be reasonable to regain charge balance: O 2- vacancies O 2- interstitials Fe 2+ vacancies Fe 2+ interstitials c) what ratio of these defects above to Fe 3+ is needed for charge neutrality ? d) Ionic materials...
Say you have a point charge of one Coulomb and a hydrogen atom some distance away....
Say you have a point charge of one Coulomb and a hydrogen atom some distance away. Within what distance would the difference of forces on the proton and electron from the Coulomb charge exceed the attraction between the proton and electron that holds the hydrogen atom together. Treat the hydrogen atom as a proton and electron 0.53 × 10−10 m (a.k.a., one Bohr radius) apart
1. Suppose that the dipole moment associated with an iron atom of an iron bar is...
1. Suppose that the dipole moment associated with an iron atom of an iron bar is 1.6 × 10-23 J/T. Assume that all the atoms in the bar, which is 4.3 cm long and has a cross-sectional area of 1.5 cm2, have their dipole moments aligned. (a) What is the dipole moment of the bar? (b) What torque must be exerted to hold this magnet perpendicular to an external field of 1.2 T? (The density of iron is 7.9 g/cm3...
What net charge would you place on a 395 g piece of sulfur if you put...
What net charge would you place on a 395 g piece of sulfur if you put an extra electron on 1 in 10^12 of its atoms? (sulfur has an atomic mass of 32.1.)
•How many N atoms would be present in 0.378 moles of N2O? •2. If you have...
•How many N atoms would be present in 0.378 moles of N2O? •2. If you have 4.55 x 1016 NO2 molecules, how many moles would you have? •3. How many grams would you need in order to have 0.885 moles of CuCO3? •4. If you have a 15.0 g sample of PF5, how many PF5 molecules would be in your sample? •5. If you have 3.14 x 1019 FeCl2 molecules, how many milligrams would you have? •6. What is the...
problem set 6
2. Magnetite Fe,O, is an iron containing ore. How many moles of iron atoms would be found in 2.5 moles of magnetite? How many atoms of iron would this be? Show all work 3. Consider the following pairs. For each pair, circle the quantity that contains the greater number of atoms or molecules Then explain your reasoning a) 1 mole Na or 1 gram Na b) 1 molecule of lz or 1 mole of la C) 58.9...
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