What is roughly the size of a hydrogen atom? A 1 angstrom B 1 picometer C...
Chemists (and Astronomers!) like to express lengths in Angstrom units where 1 Angstrom = 10^-10m. roughly the length of a chemical bond. What is the repulsive energy of two protons that are 1 Angstrom unit apart? State your answer in both Joules and Electron Volts. The resistivity of carbon is 3.5x10^-5 Ohm m. Remembering that R=pL/A. how long a piece of carbon, 1 mm in radius would be needed for a 4000 Ohm resistor. What would the electric field be...
A helium atom contains two protons, two neutrons, and two electrons, and it is electrically neutral. Each proton contains two up quarks and one down quark, and each neutron contains two down quarks and one up quark. Electrons have a charge of -e, up quarks have a charge of +2e/3, and down quarks have a charge of -1e/3. (a) How much positive charge is contained in the nucleus? с (b) How much negative charge is contained in the nucleus (absolute...
answer all 34. What is the hybridization of the phosphorus atom in PC13? a. sp b. sp c. sp d. sp'd e sp'd c. 35. What hybridization change does the carbon atom undergo in the combustion of methane? CHa() +202g) CO(g)+2H20() Copyright Cengage Leaming. Powered by Cognero. Page 7 Name: Class Date d sp sp bspp C. sp + sp d. sp +sp e. none 36. How many sigma and pi bonds are present in H2CO? a. 1 sigma bond...
what is the oxidation state for the carbon atom (a) and the carbon atom (b) labelled in the structure of the caffeine molecule shown below? What is the oxidation state for the carbon atom (a) and the carbon atom (b) A36. labelled in structure of the caffeine molecule shown below? a. N b. N a. +3 and b. +2 (A) (B) a. +2 and b. = 0 (C) a. =-3 and b. = -2 a. +1 and b. = -2...
6. Solve the initial value problem y" + y = 0, y(0)=0, y'0=1 (a) -COS X (b) -sin x (c) -sin x + cos x (d) -sin x COS X (e) COS X (f) sin x (g) sin x-COS X (h) sin x + cos x 7. Find a particular solution yn of the differential equation (using the method of undetermined coefficients): y + y =p2 (a) 2e (b) 3e (c) 4e: (d) 6e (e) 2/2 (f) e2/3 (g) e2/4...
Question 1 What is the net electric charge (in units of e) of an atom of lead (Z82)? qlead exact number, no tolerance Attempts: 0 of 5 used Question 2 Suppose a lithium atom (Z units of e? 3) has been singly ionized. What is the net electric charge of the resulting lithium ion in lithium exact number, no tolerance Attempts: 0 of 5 used Question 3 Suppose a lead atom (Z = 82) has been doubly ionized. What is...
E18M.6 The Rutherford model of the hydrogen atom (pro- posed by Ernst Rutherford in roughly 1910) imagines the electron as orbiting the proton in a circle (a) Use Newton's second law, Coulomb's law, and what you know about acceleration in circular motion to show that the electron's acceleration in a circular orbit of radius r is ã/(4me,mr) and its orbital kinetic energy is K-72/ (8πεο r), where e is the proton's charge and m is the electron's mass. (b) Show...
3: How many hydrogen atoms are connected to the indicated carbon atom? A be BIO C. 0 -0 D. 1 - 2 E 0. 1 Identify the number of lone pairs on the indicated oxygen and nitrogen atoms. A 1 N B 02 N 0 C. 01. N- D 0-0. N- E 0-0 NO
1. What is the redox state of Oxygen in a molecule of diatomic hydrogen gas (H2)? 2. NO2- + 6e- -> NH4+ (-0.41 volts) & O2 + 4e- -> 2H2O (+0.82 volts) If you balance and combine the reactions so that 52 molecules of NH4+ are oxidized to NO2-, how many molecules of O2 will be reduced to H2O? 3. NO3- + 10e- -> N2 (E0 = +0.74 V) & H+ + 2e- -> H2 (E0 = -0.42 V) If...
(1 point) a b c Given det d e f = 5, find the following determinants. g h i g h i det a b c de f. a b c 6f + c 6d + a 6e + b 6f + c = g h i 6d + a 6e + b 6f+c d e f = J